Assignment 1 by Acerixx2021 https://padlet.com/acerixx2003/Bookmarks Answer the following essay question by key in your answer in the personal box given. en-us 2021-08-15 02:46:44 UTC 2025-09-30 18:47:54 UTC hello@padlet.com https://padlet.net/icons/png/1f4d2.png (QUESTION 1 ) acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1679250187 Human activities are major causes of water pollution. Waste from industry and domestic dissolved in water lowering the level of water quality.
Explain how this problem may affect the environment and the living things.

Aktiviti manusia merupakan penyebab utaman pencemaran air. Bahan buangan daripada sumber industri dan domestik yang terlarut dalam air menurunkan tahap kualiti air.
Jelaskan bagaimana masalah ini memberi kesan terhadap persekitaran dan hidupan.

( 10 marks / markah )]]> 2021-08-15 03:02:58 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1679250187 QUESTION 2 (A) acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1679253423 The diagram 1 shows a food chain in a paddy field.
Rajah 1 menunjukkan satu rantai makanan di sawah padi.

a)  Explain the above food chain.
     Terangkan rantai makanan di atas.
     
(4 marks / markah)]]> 2021-08-15 03:13:25 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1679253423 QUESTION 2 (B) acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1679254939 b) Grasshoppers are pests of paddy plants. How can the grasshoppers can be controlled?
Explain the impact of control methods on the paddy field community.
Belalang ialah serangga perosak bagi tanaman padi. Bagaimanakah populasi belalang boleh dikawal?
Terangkan impak kaedah kawalan tersebut terhadap komuniti di sawah padi.

( 6 marks / markah )]]> 2021-08-15 03:18:08 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1679254939 Arahan: acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1679263063 Sila jawab soalan esei bahagian C berikut. 
Tarikh akhir adalah Khamis 19hb ogos 2021.]]> 2021-08-15 03:41:26 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1679263063 QUESTION 2 (A) https://padlet.com/acerixx2003/Bookmarks/wish/1679315465
·         Paddy is producer where it be eaten by grasshopper
·         Grasshopper is primer user where it be eaten by a bird
·         A bird is secondary users where it be eaten by an eagle while an eagle is tertiary users

]]> 2021-08-15 06:08:56 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1679315465 QUESTION 1Human activities are major causes of water pollution. Waste from industry and domestic dissolved in water lowering the level of water quality. Explain how this problem may affect the environment and the living things. https://padlet.com/acerixx2003/Bookmarks/wish/1679322661
Industries and industrial sites across the world are a major contributor to water pollution. Many industrial sites produce waste in the form of toxic chemicals and pollutants, and though regulated, some still do not have proper waste management systems in place. In those rare cases, industrial waste is dumped into nearby freshwater systems. When industrial waste is not treated properly (or worse, not treated at all), it can very easily pollute the freshwater systems that it comes into contact with. 
Industrial waste from agricultural sites, mines and manufacturing plants can make its way into rivers, streams and other bodies of water that lead directly to the sea. The toxic chemicals in the waste produced by these industries not only have the potential to make water unsafe for human consumption, they can also cause the temperature in freshwater systems to change, making them dangerous for many water dwelling organisms.
Other than that,Water also is used as a cooling agent to cool down generators in industrial factories and hydroelectric power generator plants. The hot water produced is then discharged into rivers or lakes causing thermal water is unsuitable for aquatic habitats. As the temperature of water rises, the dissolved oxygen content in the water will decrease and threaten the survival of aquatic lives.The increased temperature of the river water is unsuitable for aquatic habitats
Thermal pollution endangers the lives of aquatic organisms and is also hazardous to the environment. The rise in water temperature disrupts biochemical processes of aquatic organisms as fish and other aquatic animals normally live in a range of certain temperature. For example, the increase of water temperature can cause early hatchery of fish eggs or worse, they fail to hatch. For certain species, a drastic increase of water temperature can cause instant death .Furthermore, for organisms such as algae, higher temperature enhances their growth and consequently, raises the BOD level.


]]> 2021-08-15 06:32:31 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1679322661 QUESTION 2 https://padlet.com/acerixx2003/Bookmarks/wish/1679323784 a) In a food chain:
• It starts with the producer and ends with either a secondary consumer or a tertiary Consumer.Organisms feed on organisms from the previous trophic level. Energy is transferred from the consumed organisms to the feeding organisms.Energy is transferred between trophic levels when an organism eats other organisms from which it gains its energy. This energy is transferred to the organism after it has digested and assimilated the food to form new substances in the body.
• Plant is a producer and first tropic level
• Grasshopper is a primary consumer and second trophoc level 
• The bird that eat grass grasshopper is a secondary consumer and third trophic level
• The eagle that eat bird is a tertiary consumer  and forth trophic level
• Organisms in an ecosystem interact with each other in the form of a feeding relationship of which can be shown in the food chain. A food chain is the sequence energy transfer from one trophic level to another trophic level, beginning with the producers.


]]> 2021-08-15 06:36:30 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1679323784 https://padlet.com/acerixx2003/Bookmarks/wish/1679324104 2.b)
Guna racun serangga ataupun pestisid.Dapat  membunuhunuh belalang . Pengumpulan bahan kimia dalam organisma lain daripada rantai makanan kerana mutasi. Perosak mutan rintang terhadap racun serangga. Kaedah kawalan biologi.Pemangsa bunuh hanya perosak yang khusus untuk membunuh serangga perosak seperti belalang. Hal ini boleh menyebabkan ketiidakseimbangan populasi organisma dalam komuniti. Populasi perosak berkurang,Pengeluar ataupun pokok padi bertambah.


]]> 2021-08-15 06:37:39 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1679324104 QUESTION 1 https://padlet.com/acerixx2003/Bookmarks/wish/1681558478 Industry and domestic will cause water pollution because it release toxic subtances to the water and causes the water to become dirty and harmful. This will cause lack of clean water that we needed to use in daily life. Destruction of biodiversity may occur that will affect aquatic ecosystems. This also reduces plankton population which is the food source for fish that may trigger food chain and can cause death of various organisms. Other than that, thermal pollution may occur due to excessive heat dissipation into water from industrial factories. This pollution will endangers the lives of aquatic organisms and is also hazardous to the enviroment. The temperature of water increases causing dissolved oxygen content in the water will decreaseand threaten the survival of aquatic lives. Water pollution will also cause a disease such as cholera. This is because some people lack of clean water and drink contaiminated water causing them to exposed to certain diseases.]]> 2021-08-17 04:33:46 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1681558478 QUESTION 2(A) https://padlet.com/acerixx2003/Bookmarks/wish/1681567246 Paddy acts as producer that produce its own food through photosysthesis and will be consumed by primary consumers. Grasshopper will acts as primary consumers and gain energy by feeding on producers. Grassshoper will consumed by secondary consumers that is bird which feed on primary consumers. The bird then will consumed by eagle which is tertiary consumers which feed on secondary consumers.]]> 2021-08-17 04:41:13 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1681567246 QUESTION 2(B) https://padlet.com/acerixx2003/Bookmarks/wish/1681677714 Grasshopers can be controlled by using pesticides method. The number of grasshoper will reduce and will affect the ecosystem in the paddy field. This will cause imbalance ecosystem where the bird will lost it food suplly and will decrease in the number of secondary consumer. Hence, the number of eagle might decreases because when the number of preys decreases the number of predators reduces accordingly because of lack of food for the predators. Biological control also can be use to control the number of grasshoper by increasing the number of birds. However, this method will taking a long time to be effective and migth destroy the ecosystem as the number of prey increases as the number of primary consumer decrease that lead to lack of food supply.]]> 2021-08-17 06:11:33 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1681677714 QUESTION 1 https://padlet.com/acerixx2003/Bookmarks/wish/1682071756 - Excess nitrate and phosphate fertilisers in agriculture activities are one of the reason of water pollution. 
- The excess nitrate and phosphate residuals will flow into lakes and rivers with help of rain water.
- This will increase the growth of algae.
- Therefore , the algae will cover up the water surface.
- This condition known as eutrophication.
- Eutrophication is a process that occurs when the water ecosystem become rich with nutrients,resulting in changes to the structure of the ecosystem.
- It will reduce the penetration of sunlight into the water.
- Eutrophication will cause rate of photosynthesis of aquatic plants will slows down and oxygen in the water decrease.
- Hence, the aquatic plant and animal will die .
- Also the population of decomposed bacteria will increase.
- Decomposer bacteria willl disintegrate dead aquatic plants and animals and will cause excessive oxygen reduction in the water.
- Hence, level of biochemical oxygen demand (BOD) will increase.
- A high BOD level indicates low quality of water source.
- Water pollution will occur.
- Industrial factories and hydroelectric power generator plants also one of the reason water pollution.
- Water is used as a cooling agent to cool down the generators and the hot water that produced will discharged into lakes and rivers.
- The increased temperature of river will cause oxygen in water will decrease and threaten the survival of aquatic lies.
- The rise in water temperature also will disrupts biochemical processes of aquatic organisms.
- For example, the increase of water temperature can cause early hatchery of fish eggs or worse, they fail to hatch.]]> 2021-08-17 12:45:48 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1682071756 Question 2(A) https://padlet.com/acerixx2003/Bookmarks/wish/1682085105 - Food chain is the sequence of energy transfer from one tropic level to another tropic level, beginning with the producer.
- Paddy plant will acts as producer which                                                                                                           produce its own food through photosysthesis and will be consumed by primary consumers.
- Grasshopper will acts as primary consumers and will gain energy by feeding on producers.
- Grassshoper will consumed by secondary consumers which is bird that feed on primary consumers. 
-The bird then will consumed by eagle which is tertiary consumers that feed on secondary consumers.]]> 2021-08-17 12:56:12 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1682085105 Question 2(B) https://padlet.com/acerixx2003/Bookmarks/wish/1682115823
  • Grasshoppers can be controlled by pesticides method.
  • This will decrease the population of grasshoppers.
  • But this will affect on the paddy field  community.
  • One of the affect is imbalanced ecosystem.
  • the decrease of primary consumers which is grasshoppers will cause the lack of food resources by secondary consumers and eventually die
  • Hence, this also decrease the numbers tertiary consumers because limited food resources.

    • ]]>     2021-08-17 13:18:59 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1682115823     QUESTION 2 (B) https://padlet.com/acerixx2003/Bookmarks/wish/1682462160 - Farmer can rears some frogs in paddy field.
    - Frogs are great for backyard pest control, as they’ll eat just about any type of insect or grub. 
    - The number of grasshoppers can be control because of eaten by frogs.
    - Frogs are carnivores so they don't eat plants.
    - Frogs which is secondary consumers also will consumed by tertiary consumers.
    - The paddy field community will be control.]]>     2021-08-17 16:16:14 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1682462160     QUESTION 2 (A) https://padlet.com/acerixx2003/Bookmarks/wish/1682462975 - Paddy plants act as producer synthesis organic material or food through photosynthesis.
    - Grasshopper acts as primary consumer is a herbivore which eats plant.
    - Grasshopper will consumed by secondary consumers which is bird that feed on primary consumers. 
    - The bird will consumed by eagle which is tertiary consumers that feed on secondary consumers.]]>     2021-08-17 16:16:45 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1682462975     QUESTION 1 https://padlet.com/acerixx2003/Bookmarks/wish/1682464000 - Toxic waste disposal at river will cause water pollution.
    - Toxic waste dumped into water is extremely harmful to both people and environment.
    - Toxic waste will cause the quality of water decrease.
    - Toxic waste floating on the water will block sunlight and air from penetrating into the water.
    - The photosynthesis rate of aquatic plants will decrease and the amount of oxygen will be lacking.
    - It cause the aquatic plants die.
    - It harms aquatic organisms thus breaking a link 
    of food chain.
    - Aquatic animals will gradually die due to lack of oxygen and food.
    - The aquatic ecosystem will be harmed.
    - It will affects health aspects of water quality.]]>     2021-08-17 16:17:25 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1682464000     https://padlet.com/acerixx2003/Bookmarks/wish/1682478719 Industry and domestic dumped the toxic waste such as oil and pesticides into the river and cause the river become polluted.This will  causes an algal to bloom . The proliferation of newly introduced nutrients stimulates plant and algae growth, which in turn reduces oxygen levels in the water.This can causes the aquatic plant and animal to die due to the lack of oxygen.The algae will also cover the river and prevent the sunlight to penetrated or reached the bottom of the river.So the aquatic plant cannot undergo photosynthesis to produce food.This will also effect the foodchain in the river. Besides that,the polluted water may contain some disease like cholera and typhoid.The use of the polluted water can harm our health.]]> 2021-08-17 16:25:51 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1682478719 Questions 2a https://padlet.com/acerixx2003/Bookmarks/wish/1682493453 The paddy plant act as a producer because it can produce its own food through photosynthesis.The grasshopper act as a primary consumer by consumed the paddy plant.Next the grasshopper will been consumed by the bird which act as a secondary consumer.Last,the eagle act as a tertiary consumer by consuming the bird.]]> 2021-08-17 16:34:46 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1682493453 Questions 2b https://padlet.com/acerixx2003/Bookmarks/wish/1682508547 The grasshopper can be controlled by using the biological method by increasing the number of its consumer that is bird.The number of grasshopper will decrease because of there is more bird that will consumed them.But this method will needed a long time.The number of grasshopper can also be controlled by using the pesticides.It is very effective since it can quickly reduces the number of grasshopper.But the ecosystem will become unbalanced.This is because of the number of primary consumer that is grasshopper reduced.Grasshopper is the food for the bird and causes many bird die due to lack of food.When this happen,the number of eagle will also decrease.]]> 2021-08-17 16:43:14 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1682508547 Question 1 https://padlet.com/acerixx2003/Bookmarks/wish/1683165220 Industrial waste will cause the water pollution.Industries produce a tremendous amount of waste, which contains toxic chemicals and pollutants, causing air pollution and damage to our environment and us. They contain harmful chemicals, including,lead, mercury, sulfur, nitrates, abestos, and many others.Many industries, not having a proper water management system, drain the waste in the freshwater, which goes into canals, rivers, and later into sea. The toxic chemicals may change the color of water, increase the number of minerals, called eutrophication, change the temperature of water, and pose a severe hazard to water organisms.The burning of  fossil fuels also will cause water pollution. Fossil fuels like coal and oil, when burnt, produce a substantial amount of ash in the atmosphere. The particles which contains toxic chemicals when mixed with water vapor result in acid rain. Also carbon dioxide is released from the burning of fossil fuels, which can results in global warming.Other than that chemical fertilizers and pesticides also will cause water pollution. Chemical fertilizers and pesticides are used by farmers to protect crops from insects and bacterias. They are useful for the plant's growth. However, when the chemicals are mixed up with water,they produce harmful pollutants for plants and animals.Also,when it rains, the chemicals mix up with rainwater and flow down into rivers and canals which pose serious damages for aquatic animals.]]> 2021-08-18 01:36:25 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1683165220 Question 2(a) https://padlet.com/acerixx2003/Bookmarks/wish/1683180930 Paddy is the producer which can make their own food through photosynthesis. Grasshopper is the primary consumer and will gain energy by feeding on producers. The bird is the secondary consumer which eat grasshopper. The eagle is the tertiary consumer which eat the bird.]]> 2021-08-18 01:44:20 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1683180930 Question 2(b) https://padlet.com/acerixx2003/Bookmarks/wish/1683197167 Grasshoppers can be controlled by encourage the natural predators.
    Many insect-eating birds, such as swallows, are notable grasshopper predators. Other animal species also eat grasshoppers, such as praying mantis insects, small snakes, and toads. Any garden practices that encourage these natural predators will be effective at reducing or eliminating grasshopper infestations.Other than that keep chickens at the paddy plants also can controlled the number of grasshopper.Chickens can eat vast quantities of grasshoppers, so if your community and circumstances allow it, two or three chickens roaming your garden can provide near full control grasshoppers and other insects. Other domestic birds, such as ducks and geese, also serve this function.]]>     2021-08-18 01:53:33 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1683197167     https://padlet.com/acerixx2003/Bookmarks/wish/1683227851 Waste from industry and domestic contain waste from sewage, chemicals, garbages, oil and a lot more. These waste will be channel to rivers and the waste will dissolve in water. This will not only make the water quality lower but will also make the water become smelly. Excessive usage of nitrate and phosphate fertilisers in agricultural activities could make the water become rich in nutrients. This would cause eutrophication. Eutrophication is a process that occurs when the water ecosystem become rich with nutrients ,resulting in changes to the structure of the ecosystem.]]> 2021-08-18 02:11:03 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1683227851 QUESTION 2(a) https://padlet.com/acerixx2003/Bookmarks/wish/1683268178 Paddy is a producer that produce its own food through photosynthesis. Paddy will be consumed by grasshopper which is the primary consumers in this food chain. Primary consumers are herbivores which gain energy by feeding on producers. Then, the grasshopper will be feed on by bird which is a secondary consumers. Then the bird will be eaten by a tertiary consumer which is eagle. Tertiary consumers are carnivores which feed on secondary consumers ]]> 2021-08-18 02:34:08 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1683268178 Question 1 https://padlet.com/acerixx2003/Bookmarks/wish/1683274790 - domestic waste substance from industry are thrown into the rivers, streams or lakes such as oil, chemicals, nuclear waste and garbages
    - when the water ecosystem rich with toxic waste, it will resulting to the changes to the structure of the ecosystem.
    - this will effects the death of aquatic life and deterioration of water quality.
    - When polluted water flow into the oceans or landfills, hazardous materials can release toxins into the environment 
    - it will disrupting habitats and causing harm to wildlife and humans.

    ]]>     2021-08-18 02:37:47 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1683274790     QUESTION 2(B) https://padlet.com/acerixx2003/Bookmarks/wish/1683276652 The grasshopper can be controlled by biological control. Biological control is a method of controlling pests using another organisms. For example, birds can be used to control the grasshopper population in the area. This method will not pollute the soil like when using pesticides. But this method will take a long time to be effective. In a long term, this method might cause imbalance of ecosystems in the area. ]]> 2021-08-18 02:38:50 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1683276652 Question 2a https://padlet.com/acerixx2003/Bookmarks/wish/1683601630 - Paddy in the food chain is the producer, which can produce its own food through photosynthesis process.
    - Paddy will be consumed by the grasshopper, which is the primary consumer and gain energy by feeding on producers.
    - Grasshopper will then be consumed by secondary consumer, which is the bird.
    - Then, the bird will consumed by the eagle, which is a carnivore and acts as a tertiary consumer.]]>     2021-08-18 06:12:55 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1683601630     QUESTION 2(A) https://padlet.com/acerixx2003/Bookmarks/wish/1683971766 - Paddy acts as producers that produce its own food through photosysthesis and will be consumed by primary consumers.
    - Grasshopper will acts as primary consumers and gain energy by feeding on paddy.
    - Grassshoper will consumed by secondary consumers which is bird that feed on primary consumers.
    - Then the bird will consumed by eagle which is tertiary consumers which feed on secondary consumers.

    ]]>     2021-08-18 12:13:18 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1683971766     Question 2b https://padlet.com/acerixx2003/Bookmarks/wish/1684104479 - Grasshoppers can be controlled by biological control.
    - Biological control is a method to control the population of pests using their natural enemies.
    - The two types of interaction that can be applied in biological control are parasitism and prey-predator.
    - For example, the farmer of the paddy field can rear predator of grasshoppers such as birds to consume and control the population of grasshoppers.
    - This method does not pollute the environment.
    - It does not kill other organisms expect the pest.
    - However, the impact of biological control in the long term is it takes a long time to show the effect.
    - This method may also disrupt the balance of the ecosystem due to the introduction of new species in the ecosystem.]]>     2021-08-18 13:48:51 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1684104479     QUESTION 1 https://padlet.com/acerixx2003/Bookmarks/wish/1684203023 Waste from industry and domestic will cause eutrophication. Algal blooms, death of aquatic life and deterioration of water quality are the effects of eutrophication. Eutrophication is a process that occurs when the water ecosystem becomes rich with nutrients, resulting in changes to the structure of the ecosystem. Excessive usage of nitrate and phosphate fertilisers in industry can cause eutrophication. Excess nitrate and phosphate residuals flow into lakes and rivers. The increases in nitrate and phosphate stimulates rapid growth of algae , covering up the water surface. This condition is eutrophication and this situation reduces the penetration of sunlight into the water. The rate of photosynthesis of aquatic plants slows down and the content of dissolved oxygen in the water decreases. This cause aquatic plants and animals to die. The abundance of algae and the death of aquatic organisms also cause a rise in the population of decomposer bacteria. Decomposer bacteria disintegrate dead aquatic plants and animals in the presence of oxygen, which causes an excessive oxygen reduction in the water. This increases the level of biochemical oxygen demand (BOD). ]]> 2021-08-18 14:34:45 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1684203023 QUESTION 2(A) https://padlet.com/acerixx2003/Bookmarks/wish/1684204867 A food chain is the sequence of energy transfer from one trophic level to another trophic level, beginning with the producer. Paddy acts as producer (first trophic level) that produce its own food through photosynthesis and will be consumed by primary consumers. Grasshopper will act as primary consumer (second trophic level) and gain energy by feeding on producers that is paddy. Grasshopper will consume by secondary consumers (third trophic level) that is bird which feed on primary consumers. The bird then will consume by eagle which is tertiary consumers (fourth trophic level) which feed on secondary consumer.

    ]]>     2021-08-18 14:35:42 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1684204867     QUESTION 2(B) https://padlet.com/acerixx2003/Bookmarks/wish/1684206469 The grasshopper can be controlled by using biological control method. We can increase the number of birds at paddy field community. Grasshoppers will consume by more birds. This will reduce the number of grasshopper and cause the imbalance ecosystem. However, this method will taking a long time to be effective and might destroy the ecosystem as the number of prey (bird) increases as the number of primary consumer (grasshopper) decreases that lead to lack of food supply. Other method to control the number of grasshoppers is by using pesticides method. It is very effective because we can reduce the number of grasshoppers quickly. This method also cause imbalance ecosystem and polluting the soil in the paddy fields.

    ]]>     2021-08-18 14:36:30 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1684206469     Question 1 https://padlet.com/acerixx2003/Bookmarks/wish/1684207187 - Waste from industry and domestic dissolved in water will make the water becomes rich in nutrients.
    - For example, excess nitrate and phosphate residuals that flow into water will stimulates rapid growth of algae, covering up the water surface.
    - This is because eutrophication occurs.
    - This situation reduces the penetration of sunlight into the water.
    - The rate of photosynthesis of aquatic plants in water will slows down and the content of dissolved oxygen in the water decreases.
    - This causes aquatic plants and animals to die.
    - Large quantity of algae and the death of aquatic organisms also cause a rise in population of decomposer bacteria.
    - These bacteria decompose dead aquatic plants and animals in the presence of oxygen, which causes an excessive oxygen reduction in the water.
    - This increases the level of biochemical oxygen demand (BOD).
    - A high BOD level indicates low quality of water source.
    - Thus, the water is not save for humans nor other living things to consume.

    ]]>     2021-08-18 14:36:54 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1684207187     2a bradfordboyd851 https://padlet.com/acerixx2003/Bookmarks/wish/1684277355 Paddy acts as producers that produce its own food through photosysthesis and will be consumed.Then, grasshopper will acts as primary consumers and gain energy by feeding on paddy. Grassshoper will consumed by secondary consumer that is bird.Then the bird will consumed by third consumer which is eagle to gain energy.]]> 2021-08-18 15:12:23 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1684277355 2b bradfordboyd851 https://padlet.com/acerixx2003/Bookmarks/wish/1684287543 Grasshoper can be controlled using pesticide. Pesticide is a substance that used for destroying insect or others harmful to cultivated plants. There have many types of pesticide and each meant to be effective against specific pests. One of example is glyphosate.]]> 2021-08-18 15:17:19 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1684287543 Question 2(a) https://padlet.com/acerixx2003/Bookmarks/wish/1684289119 - A food chain is the sequence of energy transfer from one trophic level to another trophic level, beginning with the producer.
    - The producer in the food chain is paddy plants (first trophic level). It makes it own food through photosynthesis.
    - The grasshopper is the primary consumer (second trophic level) which is herbivore that gain energy by feeding on producer, the paddies.
    - Then, the grasshopper will be eaten by the bird which is a secondary consumer (third trophic level).
    - the bird is secondary consumer (third trophic level) will be feed on the eagle which is the tertiary consumer (fourth trophic level). This is because the tertiary consumers is a carnivore which feed on secondary consumers.]]>     2021-08-18 15:18:08 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1684289119     Question 2(b) https://padlet.com/acerixx2003/Bookmarks/wish/1684338880 The grasshopper can be controlled by the conservation biological control which involves modifying the environment or existing practices to protect and enhance natural enemies and reduce pest damage. Such as using birds. This method will not polluted the biodiversity but it will took a very long time to show results.]]> 2021-08-18 15:43:20 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1684338880 QUESTION 2(B) https://padlet.com/acerixx2003/Bookmarks/wish/1685290879 The grasshopper can be controlled by using pesticides. This method is very effective but this will affect the paddy field community and cause the imbalance ecosystem. When the number of primary consumer which is grasshopper is decrease, the number of secondary consumer will also decrease and cause the tertiary consumer lack of food resources.
    The grasshopper also can be controlled by using the biological control. Biological control is a method to control the population of pest by using another organism. The population of grasshopper can be control by increasing the number of its consumers which is bird. However this method will take a long time to be effective and it will cause the imbalance ecosystem as the primary consumer decrease.

    ]]>     2021-08-19 02:59:34 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1685290879     Question 1 https://padlet.com/acerixx2003/Bookmarks/wish/1685908196 - Poor waste management affects many ecosystems and species.
    - pollution and hazardous waste environmental materials, which lead to change in the quality of the surrounding atmosphere.
    -When food waste is sent to landfill, it decomposes.
    - As it decomposes it releases methane gas. The methane gas is very toxic to the soil.
    It is harmful that it can poison the soil. Therefore, plants unable to grow in the soil. 
    - It will also affect the habitat of the animals and kill the animals because of the toxicity of the soil. Such as worms, snakes and mouse that lived on the ground.
    - Pollution of industrial waste water caused by the discharge of harmful chemicals and substances into water.
    -dumping of garbage inside the water also will impact the marine life.
    - it will suffocates marine life such as coral and fish as they might accidentally eat them.]]>     2021-08-19 12:11:50 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1685908196     Question 2a https://padlet.com/acerixx2003/Bookmarks/wish/1685914616 -Paddy act as the producer. It produce its own food by photosynthesis.
    - Grasshopper act as the primary consumer. It consume its food from paddy.
    - Bird act as the secondary consumer. It consume its food from the primary consumer that is grasshopper.
    - Eagle act as the third consumer. It consume its food from the secondary consumer that is birds.]]>     2021-08-19 12:17:57 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1685914616     Question 2b https://padlet.com/acerixx2003/Bookmarks/wish/1685932788 -We can make homemade solution to use as a spray. Example of natural remedies for pest are garlic, onion and grasshopper repellent. This will not kill the grasshopper but can keep grasshopper away from the plants.
    -We can use pesticides that is harmless for the plants. 
    -We can also set baits and traps to catch and kill the grasshopper. This method will control the grasshopper population. At the same time, it is safe and harmless to the plants.]]>     2021-08-19 12:34:46 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1685932788     Question2(b) https://padlet.com/acerixx2003/Bookmarks/wish/1685971051 - The grasshopper can be control by biological control method.
    - This method does not use any chemical substance and just use other organism.
    - Therefore, this method would not pollute the soil or give negative effect to surrounding.
    - For example, we may use eagle to decrease the population of grasshopper.
    - However, this method need long time to show the result.
    - This method is better compared to pesticide method.]]>     2021-08-19 13:04:43 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1685971051     Question2 (a) https://padlet.com/acerixx2003/Bookmarks/wish/1685978826 - Paddy plant is a producer that make its own food through photosynthesis process.
    - Grasshopper which is herbivore will be primary consumer that will eat paddy plant. 
    - Bird that is carnivore will be secondary consumer that will eat grasshoppers.
    - Eagle that us carnivore will be tertiary consumer that will eat bird.]]>     2021-08-19 13:10:35 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1685978826     Question 1 https://padlet.com/acerixx2003/Bookmarks/wish/1685993792 - Waste from industry or domestic waste contain chemical or even oil. 
    - These waste will be throw into river.
    - Other than that, marine also may cause water pollution.
    - This is due to the waste from the marine such as black coloured oil.
    - This will cause the quality of the water lower because all the dirty substance will dissolve in the river water. 
    - When the water come dirty and polluted, many dangerous animal such as snake or worm will lived there.
    - However, the excess of phosphate and nitrate in industrial activities may cause the water become better.
    - This will cause eutrophication will happen.
    - Eutrophication is a process that happen when the water become good.]]>     2021-08-19 13:20:41 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1685993792     QUESTION 2( A) https://padlet.com/acerixx2003/Bookmarks/wish/1686147952 - The paddy plant as producer that make it own food through the photosysthesis.
    - The grasshopper will become the primary consumer after eating the paddy.
    - The bird will become the secondary consumer after eating the grasshopper.
    - The eagle will become the tertier consumer after eating the bird.]]>     2021-08-19 14:43:14 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1686147952     QUESTION 2 (B) https://padlet.com/acerixx2003/Bookmarks/wish/1686165132 - The grasshoppers can be controlled by using pesticide.
    -It will kill the grasshoppers so it will reduce the number of the grasshoppers.
    - The other method is biological control.
    - It can help the grasshopper population become balanced.
    - This will also help the ecosystem becoming balanced. 
    - The food chain will also not get interrupted.]]>     2021-08-19 14:53:02 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1686165132     Question 1 https://padlet.com/acerixx2003/Bookmarks/wish/1686238419 - Excessive usage of nitrate and phosphate fertilisers in agricultural activities and other factors cause eutrophication
    - These residuals flow into lakes and rivers with the help of rain water. The increase in nitrate and phosphate stimulates rapid growth of algae, covering up the water surface.
    - This situation reduces the penetration of sunlight into the water
    - The rate of photosynthesis of aquatic plants slows down and the content of dissolved oxygen in the water decreases. This causes aquatic plants and animals to die. The abundance of algae and the death of aquatic organisms also cause a rise in the population of decomposer bacteria.
    - Decomposer bacteria disintegrate dead aquatic plants and animals in the presence of oxygen, which causes an excessive oxygen reduction in the water. This increases the level of biochemical oxygen demand (BOD) which indicates low quality of water source.
    -     Besides, pollution of water causes lack of portable water for the use in daily life.
    -Clean water is needed especially for drinking or sanitation.
    -Lack of clean water causing spread of infectious disease and harming the human health.
    -For example, waterborne diseases like Typhoid, Cholera that can cause diarrhea.]]>     2021-08-19 15:32:06 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1686238419     Question 2(a) https://padlet.com/acerixx2003/Bookmarks/wish/1686262805 -The plant is a producer that produce its own food through photosynthesis.
    -The grasshopper is the primary consumer and is a herbivore which gain energy by feeding on producer.
    -Bird is the secondary consumer as it is a carnivore which feed on primary consumer.
    -Eagle is the tertiary consumer as it is a carnivore which feed on secondary consumer.]]>     2021-08-19 15:45:31 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1686262805     2 (A) https://padlet.com/acerixx2003/Bookmarks/wish/1686336371 - The paddy plant is a producer that can make its own food through photosynthesis. 

    - The grasshopper which is a herbivore is a primary consumer that will consume the paddy plant to survive. 

    - The bird is a secondary consumer that will eat the grasshopper. 

    - Then, the bird will consumed by the eagle which is a tertiary consumer. ]]>     2021-08-19 16:27:31 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1686336371     Question 2(b) https://padlet.com/acerixx2003/Bookmarks/wish/1686374873 -The grasshoppers can be controlled by using biological control.
    -This method used predator to kill the pests.
    -For example, frog can be used to control grasshopper population at the paddy field.
    -This method is a good alternative as it do not uses any chemical material as pesticides and herbicides.
    -It is harmless to the paddy as the soil will not get polluted.
    -On the other hand, this method can disrupt the ecosystem of the paddy field community.
    - It also takes a lot of time to be effective to control the pest.]]>     2021-08-19 16:48:25 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1686374873     2 (B) https://padlet.com/acerixx2003/Bookmarks/wish/1686398575 - Pesticides can be use to control the population of the grasshoppers. 
    - Although using pesticides is the most the most effective method, pesticides can contaminate the soil, water, turf and other vegetation. 
    - Pesticides also have some direct harmful effect on plant poor root hair development. 
    -Beside that, using the pesticides will cause the imbalance ecosystem and effect the paddy field community  


    ]]>     2021-08-19 17:02:16 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1686398575     https://padlet.com/acerixx2003/Bookmarks/wish/1686451571 - Waste from industry and domestic contains the waste from sewage, factory, garbages and oil. 
    - These waste will dissolve in water and causing the rate of biochemical oxygen demand (BOD) is high. 
    - Biochemical oxygen demand is the total amount of oxygen needed by microorganisms such as bacteria and fungi to decompose organic materials in water. 
    - So, a high biochemical oxygen demand level shows that, the quality of water is low. 
    - The low quality of water will lead to the spread of diseases such as cholera, hepatitis A and thypoid which will affect human health and will also cause many deaths. 
    - Beside that, the low quality of water also affect living things because low quality of water contains toxic substances that will cause the plants and animals die. 
    - Other than that, if the low quality of water is bad and the pollution is very large-scaled, huge numbers of fish, birds and other animals will die. ]]>     2021-08-19 17:34:39 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1686451571     QUESTION 1 https://padlet.com/acerixx2003/Bookmarks/wish/1686462306 Waste from industry and domestic will cause eutrophication. Excessive usage of nitrate and phosphate fertilisers in agricultural activities and other factors can also cause eutrophication. Excess nitrate and phosphate residuals flow into lakes and rivers with the help of rain water. The increase in nitrate and phosphate stimulates rapid growth of algae and covering up the water surface. This condition is known as eutrophication. This situation will reduces the penetration of sunlight into the water. The rate of photosynthesis of aquatic plants slows down and the content of dissolved oxygen in the water decreases. This causes aquatic plants and animals to die. The abundance of algae and the death of aquatic organisms also cause a rise in the population of decomposer bacteria. Decomposer bacteria disintegrate dead aquatic plants and animals in the presence of oxygen, which causes an excessive oxygen reduction in the water. This increases the level of biochemical oxygen demand (BOD).]]> 2021-08-19 17:41:20 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1686462306 https://padlet.com/acerixx2003/Bookmarks/wish/1687884398 2a
    -Paddy acts as producers that produce its own food through photosysthesis and will be consumed. 
    -Then, grasshopper will acts as primary consumers and gain energy from paddy by feeding it.
    -Grassshoper will consumed by secondary consumer which is the bird.
    -Then the bird will consumed by tertier consumer which is eagle to gain energy.]]>     2021-08-20 13:21:12 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1687884398     2b-Grasshoper can be controlled using pesticide. -Pesticide is a substance that used for destroying insect or others harmful to cultivated plants. -There have many types of pesticide and each be meant to be effective against specific pests. -One of example is acephate. https://padlet.com/acerixx2003/Bookmarks/wish/1687885059 2021-08-20 13:21:40 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1687885059 QUESTION 1 https://padlet.com/acerixx2003/Bookmarks/wish/1690875896 -Industrial waste is waste generated by manufacturing or industrial processes.
    -Example of industrial waste are trash, oil, solvents, chemicals, and similar wastes.
    -Industrial waste may be toxic, ignitable, corrosive or reactive.
    -If improperly managed, this waste can pose dangerous health and environmental consequences.
    -Waste water from manufacturing or chemical processes in industries contributes to water pollution.
    -The effects of water pollution are not only devastating to people but also to animals, fish, and birds.
    -Polluted water is unsuitable for drinking, recreation, agriculture, and industry.
    -It also diminishes the aesthetic quality of lakes and rivers.
    -More seriously, contaminated water destroys aquatic life and reduces its reproductive ability.]]>     2021-08-23 10:00:40 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690875896     QUESTION 2(A) https://padlet.com/acerixx2003/Bookmarks/wish/1690889722 -Plants, which convert solar energy to food by photosynthesis.
    -Plant are the primary food source.
    -Grasshopper, a primary consumer will eat and gain energy from the plant.
    -Then, the grasshopper will be eaten by a bird which is a secondary consumer.
    -Lastly, the bird will be eaten by an eagle that is a tertiary consumer.]]>     2021-08-23 10:17:44 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690889722     QUESTION 2(B) https://padlet.com/acerixx2003/Bookmarks/wish/1690908650 -The grasshopper can be controlled with biological control. 
    -Biological control is a method of controlling pests using another organisms that consume them.
    -Frogs is one of the example that can be used to control the grasshopper population in the paddy field.
    -This frog treatment could raise soil nutrient status, improve rice growth, and increase the contents of soluble protein, chlorophyll, and soluble sugar in rice leaves to some extent, thus increasing grain yield significantly.
    -Frog is a carnivores so it will not eat the paddy plants.
    -this method also does not harm the environment like chemical pesticides,


    ]]>     2021-08-23 10:41:48 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690908650     TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690935854 13 / 20]]> 2021-08-23 11:17:53 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690935854 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690936278 6 / 20]]> 2021-08-23 11:18:24 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690936278 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690936639 12 / 20]]> 2021-08-23 11:18:54 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690936639 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690936957 6 / 20]]> 2021-08-23 11:19:19 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690936957 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690937279 8 / 20]]> 2021-08-23 11:19:42 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690937279 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690937497 3 / 20]]> 2021-08-23 11:20:00 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690937497 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690937759 9 / 20]]> 2021-08-23 11:20:23 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690937759 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690938009 2 / 20]]> 2021-08-23 11:20:40 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690938009 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690938340 11 / 20]]> 2021-08-23 11:21:06 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690938340 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690938700 9 / 20]]> 2021-08-23 11:21:29 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690938700 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690938923 4 / 20]]> 2021-08-23 11:21:48 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690938923 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690939250 6 / 20]]> 2021-08-23 11:22:10 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690939250 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690939553 9 / 20]]> 2021-08-23 11:22:33 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690939553 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690939846 11 / 20]]> 2021-08-23 11:22:53 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690939846 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690940095 7 / 20]]> 2021-08-23 11:23:12 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690940095 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690941518 15 /20]]> 2021-08-23 11:25:07 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690941518 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690941937 13 / 20]]> 2021-08-23 11:25:31 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690941937 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690942326 11 / 20]]> 2021-08-23 11:25:57 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690942326 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690942512 1 / 20]]> 2021-08-23 11:26:10 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690942512 TOTAL MARK acerixx2003 https://padlet.com/acerixx2003/Bookmarks/wish/1690942787 3 / 20]]> 2021-08-23 11:26:26 UTC https://padlet.com/acerixx2003/Bookmarks/wish/1690942787