https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4 Made with joy en-us 2021-07-22 01:47:13 UTC 2024-05-27 14:23:09 UTC hello@padlet.com hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1662806885 A mechanic uses  a 15 cm long spanner and applies a force of 300N at the end of a spanner to undo a nut. What is the moment that he applies? (Give your answer in correct unit)]]> 2021-07-28 05:16:28 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1662806885 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1662808926 2021-07-28 05:18:59 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1662808926 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1662809841 2021-07-28 05:20:05 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1662809841 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1669749994 Explain how water uptake from root to leaves]]> 2021-08-05 07:01:23 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1669749994 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1669754581 How carbon dioxide and water can be obtained in plants to make photosynthesis?]]> 2021-08-05 07:07:12 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1669754581 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786695397 Complete the equation above. HINT : Na is more reactive that H
Na(s)+H2​O(l) ------>

​

​​

]]> 2021-10-03 03:57:46 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786695397 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786697258 What is the correct final equation for the reaction between Cl2 and KI? HINT : You must take a look at reactivity series of Halogen

  Cl2 + KI ------->]]> 2021-10-03 04:00:33 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786697258 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786698716 Define exothermic and endothermic reaction. Give one example of exothermic and endothermic reaction]]> 2021-10-03 04:02:13 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786698716 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786701631 Identify which element is having oxidation and reduction? HINT : Look at the oxidation state number
3 Hg²⁺ + 2 Fe (s) ------>  3 Hg₂ + 2 Fe³⁺                                           ]]> 2021-10-03 04:06:25 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786701631 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786704909 Identify which element is having oxidation and reduction. HINT : Look at the presence and losing of oxygen 

2Mg + CO2 ---> 2MgO + C]]> 2021-10-03 04:11:02 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1786704909 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970396990 Question 1: A balanced diet contains these nutrients:
Carbohydrates  fats  proteins  vitamins  minerals  water

a. Which of these nutrients can provide energy?
b. What is role of proteins in the diet?
c. What role of fibre in the diet?

]]> 2022-01-02 01:32:18 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970396990 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970397715 List three health problems associated with obesity]]> 2022-01-02 01:35:07 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970397715 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970397860 What is coronary heart disease?]]> 2022-01-02 01:35:39 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970397860 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970397960 Define malnutrition]]> 2022-01-02 01:36:01 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970397960 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970398067 What is the difference between starvation and malnutrition?]]> 2022-01-02 01:36:27 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970398067 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970398178 What is meant by deficiency disease?]]> 2022-01-02 01:36:53 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970398178 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970398331 Give three examples of deficiency disease]]> 2022-01-02 01:37:29 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1970398331 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977811238 What is digestion?]]> 2022-01-06 03:04:41 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977811238 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977853182 Name two groups of food that do not need to be digested.]]> 2022-01-06 03:39:48 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977853182 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977854263 What does digestion change each of these kinds of food into? 
a. Carbohydrate
b. Protein
c. Fats]]> 2022-01-06 03:40:49 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977854263 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977854833 What is meant by mechanical digestion and chemical digestion?]]> 2022-01-06 03:41:21 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977854833 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977855550 What enzymes that responsible to digest protein in stomach?]]> 2022-01-06 03:42:01 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977855550 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977855995 Give three examples of mechanical digestion]]> 2022-01-06 03:42:27 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977855995 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977856510 What is plaque?]]> 2022-01-06 03:42:54 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977856510 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977857237 What are incisors used for?]]> 2022-01-06 03:43:32 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977857237 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977857848 Explain how tooth decay happen

]]> 2022-01-06 03:44:06 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/1977857848 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012588843 Question 1: Oxides are classified as acidic, basic, neutral and amphoteric. Give the pH of solution and one example for each of these oxides.]]> 2022-01-26 02:28:18 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012588843 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012593607 Explain the term amphoteric]]> 2022-01-26 02:31:40 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012593607 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012595103 Name two reagent that are needed to show that an amphoteric
HINT : give one example of acid and bases]]> 2022-01-26 02:32:52 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012595103 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012596233 Describe how wolud use litmus to test if a solution is a acidic?]]> 2022-01-26 02:33:48 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012596233 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012597463 Acids react with metal carbonates. Write a word equation for the reaction of calcium carbonate with hydrochloric acid]]> 2022-01-26 02:34:50 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2012597463 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032019515 (a) List five different uses of energy in the human body
(b) Name the process that releases energy from food, so that body can use it
(c) Write a word equation for the process that you have named in b]]> 2022-02-07 01:05:56 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032019515 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032020919
(a) What is inspired air?
(b) What is expired air?
(c) List three differences between inspired air and expired air]]> 2022-02-07 01:07:08 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032020919 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032023492 (a) What is aerobic respiration?
(b) What is anaerobic respiration?
(c) List four differences between anaerobic and aerobic respiration.]]> 2022-02-07 01:09:24 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032023492 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032025645 (a) Explain what is meant by the term gas exchange
(b) Where is the gas exchange surface in humans?
(c) List three features of the human gas exchange surface that help it work efficiently]]> 2022-02-07 01:11:08 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032025645 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032042289 For each description, state whether it applies to aerobic respiration, to anaerobic respiration  or to both
(a) Lactic acid or alcohol made
(b) Energy released from glucose
(c) Carbon dioxide made
(d) Heat released]]> 2022-02-07 01:25:16 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2032042289 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2044588918 a) What is the purpose of respiration?
b) What is the energy released by respiration used for?
c) What is anaerobic respiration?
d) List three ways in which anaerobic respiration in human differs from anaerobic respiration

]]> 2022-02-13 14:24:04 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2044588918 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2044591311 a) What is larynx
b) What is the function of cilia in the respiratory passages?
c) Where does gas exchange take place in a human?
d) What three adaptations of alveoli to ensure the efficiency of gas exchange?
e) State the function of goblet cells
f) How exercise can affect breathing?]]> 2022-02-13 14:26:55 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2044591311 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057013194 1. Material may expand when heated. The expansion of solid materials can be a problem, but it can also be useful
a) Give one example of a situation where the expansion of a solid material can be a problem
b) Give one example of a situation where the expansion of a solid material can be made use of

]]> 2022-02-20 05:14:14 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057013194 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057015717 2. Thermometers are used to measure temperature
a) Explain how a liquid - in - glass thermometer works
b) Every temperature scale must have at least two fixed points. What are the fixed points on the Celsius scale]]> 2022-02-20 05:20:19 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057015717 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057017126 3. Complete the sentence below writing solids, liquids and gases in the correct spaces

When materials are heated, as a rule ....................................expand more slowly than ...................................... and these expand more slowly than .........................................]]> 2022-02-20 05:24:09 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057017126 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057849129 1) State the factors that can increase the rate of reaction
2) Explain in term of collision theory if ;-
     a) Temperature increases
     b) Use catalyst
     c) Use smaller size of particles
     d) Use highly concentrated reactannt]]> 2022-02-21 01:36:39 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057849129 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057850011 1) Give two types of reactions
2) Describes the differences between endothermic and exothermic reactions]]> 2022-02-21 01:37:21 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2057850011 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2072720050 Q1: Answer the following question
a. What is stimuli?
b. Give two examples of effectors
c. Where are the cell bodies of each of these types of neurone found: i. Sensory neurone ii. Relay neurone iii. Motor neurone
d. Give two examples of voluntary actions
e Give two examples of involuntary actions
f. What is reflex actions?
g. Explain how reflex actions helps us when we touch something hot. You may include these words in your explaination : effector, electrical impulse, motor neurone, receptor, relay neurone, sensory neurone]]> 2022-03-02 02:58:47 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2072720050 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2072735141 Choose the term from the list that matches each of the descriptions. You may use each term once, more than once or not at all

Circular muscles   conjunctiva   contraction   cornea   effector  lens   motor neurone   radial muscles   receptor   relaxation   relay neurone   retina   sensory neurone  suspensory ligaments

a. A nerve cell that transmits impulses from the CNS to an effector
b. A cell that is sensitive to a stimulus
c. The part of the eye that refracts light rays most strongly
d. The part of the eye that contains receptor cells
e. The action of the ciliary muscle when the eye is focusing on a nearby object
f. The muscles in the iris that contract to reduce the amount of light entering the eye


]]> 2022-03-02 03:09:15 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2072735141 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2087309663 a. Define homeostasis
b. Give two hormones that are secreted by pancreas
c. Describe the function of each hormone that you answer in (a)
d. Explain what happen if the blood glucose level increase
e. Explain what happen if blood glucose level decrease]]> 2022-03-10 02:01:04 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2087309663 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2087331446 a. Give a normal temperature of human 
b. Explain how control of body temperature works, if the temperature is greater than normal body temperature
c. Explain how control of body temperature works, if the temperature is lower than normal body temperature]]> 2022-03-10 02:13:02 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2087331446 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2087339877 a. What part of the shoot is sensitive to light?
b. What part of the shoot responds to light?
c. How does the normal response of a shoot to light help the plant?
d. Explain what happen if the light spread evenly to plants
e. Explain what happen to the growth of plant if the light only reached the right side of plants. ]]> 2022-03-10 02:17:35 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2087339877 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2092870047 Calculate mass of one mole for C2H5OH. ( C= 12, H= 1, O =16)]]> 2022-03-14 01:42:03 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2092870047 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2092871337 How many moles are there in 60g of sodium hydroxide, NaOH? ( Na= 23, O =16 , H= 1)]]> 2022-03-14 01:43:03 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2092871337 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2092874321 What is the mass of 0.5 mol of copper(ii) sulfate crystals?]]> 2022-03-14 01:45:09 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2092874321 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133906418 1. When a force moves, it does work. Complete the following sentences, writing more or less in the spaces

a. When it moves, a bigger force does ........................... work than a smaller force

b. The greater the distance moved by the force, the ........................................... work it does. ]]> 2022-04-07 04:08:25 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133906418 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133907611 Power tells us about how quickly work is done. Complete the following sentences writing work or energy in the spaces 

a. Power is the rate at which ......................... is transferred

b. Power is the rate at which .........................is done

]]> 2022-04-07 04:09:51 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133907611 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133911725 Omar and Ahmed are lifting weights in the gym. Each lifts a weight of 200N. Omar lifts the weight to a height of 2.0m, whereas Ahmed lifts it to a height of 2.1m. Who does more work in lifting the weight? Explain how you know. (HINTS: Find the force and distance then use the formula W= F x d)]]> 2022-04-07 04:14:51 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133911725 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133926466 Millie and Lilly are identical twins who enjoy swimming. Their arms and legs provide the force needed to move them through the water. Millie can swim 25m in 50s. Lily can swim 100m in 250 s.

a. Calculate the swimming speed of each twin
(use formula speed = distance / time taken)

b. Which twin has the greater power when swimming? Explain how you can tell]]> 2022-04-07 04:30:36 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133926466 hafifahabubakar6 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133933083 Two girls are estimating each other's power. One runs up some steps, and the other times her. Here are their results

Height of one step = 20 cm (need to convert in m because height consider as a distance)

Number of steps = 36 

mass of runner  = 45kg

time taken = 4.2s

a. Calculate the runner's weight (Acceleration due to gravity g - 10m/s^2) use the formula W - mass x gravitational field strength )

b. Calculate the increase in g.p.e as she runs up the steps 

c. Calculate the power. (Use the energy transferred that you get in c) - use the formula Power = Energy transferred / time taken]]> 2022-04-07 04:37:49 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2133933083 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174881877 Question 1 :
What are chromosome made of?]]> 2022-05-09 01:45:37 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174881877 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174882456 What are homologous chromosomes?]]> 2022-05-09 01:46:12 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174882456 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174882734 What are alleles ? ]]> 2022-05-09 01:46:29 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174882734 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174884013 a. The allele for brown eyes is dominant to the allele for blue eyes. Write down suitable symbols for these alleles.

b. What is the phenotype of a person who is heterozygous for this characteristic?]]> 2022-05-09 01:47:45 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174884013 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174884689 If a normal human cell has 46 chromosomes, how many chromosomes are there in a human sperm cell?]]> 2022-05-09 01:48:22 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174884689 https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174886798 Using the symbols N for normal wings, and n for vestigial (very small wings) write down the following 
a. genotype of a fly which is heterozygous for this characteristic
b. the possible genotypes of its gametes]]> 2022-05-09 01:50:07 UTC https://padlet.com/hafifahabubakar6/dy7agugcdu5i6tc4/wish/2174886798