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1. Why is a raincoat made of plastic, not paper?

Answer: Because plastic does not let water in. Paper gets wet and tears easily.

2. Name two things in your room that are made of glass.

Answer: A mirror and a window. (Any two glass items)

3. Is rubber stretchy or stiff?

Answer: Rubber is stretchy.

4. Why do we use metal to make keys?

Answer: Because metal is strong and does not break easily.

5. What material would you use to make a bridge: paper or metal? Why?

Answer: Metal, because it is strong and can hold heavy things.

6. If you want to see through something, what material should you use?

Answer: Glass or clear plastic.

7. If you drop a metal cup and a glass cup, which one might break? Why?

Answer: The glass cup might break because glass is delicate.

8. If you could design a new water bottle, what material would you choose and why?

Answer: Plastic, because it is light and does not break easily.

Higher-Order “What If / How” Questions

9. What if you left an ice cube outside in the sun for a long time? What would happen and why?

Answer: It would melt and turn into water because the sun gives heat.

10. How would you change a hard chocolate bar into a liquid without eating it?

Answer: Warm it or hold it in your hand. Heat will melt it.

11. What if your wet clothes didn’t dry even after keeping them outside? What could be the reason?

Answer: Maybe there was no sunlight or wind. Clothes need heat and air to dry.

12. How can we make a soft material like clay harder?

Answer: Leave it in the air to dry or heat it. It becomes hard when water dries out.

13. What if you heated a piece of paper—what might happen and why?

Answer: It could burn and turn into ash because heat can destroy paper.

14. What if you put a plastic bottle full of water in the freezer? How might the bottle change?

Answer: The water will freeze and get bigger. The bottle might swell or bend.

15. How can we change a piece of paper without tearing or cutting it?

Answer: We can fold it, roll it, or bend it.

16. What if you heated butter and then put it back in the fridge? How would it change each time?

Answer: Heat makes it melt into liquid. The fridge makes it hard again.

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Name: Alaynah Afizah Chowdhury

Grade:4E

Topic: Air Pollution

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https://youtu.be/UWHPgKLfgSQ

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Dilruba Akter Mozumder

Grade : 4D

Topic: Air pollution

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Air Pollution Infographic Images - Free Download on Freepik

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Find & Download Free Graphic Resources for Air Pollution Infographic Vectors, Stock Photos & PSD files. ✓ Free for commercial use ✓ High Quality Images #freepik

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We need to stop air pollution

By Waseeqa Binte Sultan

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Air pollution is when harmful gases & particles fill the air, making it dirty and unsafe to breathe. It can come from cars, factories, burning fuel & even wildfires. This pollution can cause many health problems and damage to our environment. We must take necessary steps to keep our air and eventually our environment clean.

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4c-Wasi

-We can’t live without water because we can drink water,wash our hands ,and more things . That’s why we should not Pollute the water

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Blue Simple Rounded Environment Infographic

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Login to access and create your next design.

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Name: Mirza Ayat Hossain

Grade: 4-B

Topic: How to stop air pollution

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Digital poster creation - by Anika Muntaha

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Digital poster creation - by Anika Muntaha

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Air pollution is very harmful for the Earth.

We need to save it from air pollution so it can’t damage the atmosphere any further.

1-less cars means less gas, so we can use public transport or cycles.

2-we can plant more trees to keep the air cleaner.

3-burning toxic waste or trees can be very harmful, so we need to spreed awarness.

By: anika

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Name:Afraj

Grade:4

Section:B

House:Ventus

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Stop polluting water bodys, pollution can harm our bodys and animals if we stop polluting the water bodys earth will be a great place and everyone will be happy:). Afraj Hasan (4B)

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Name:Roshan

Grade:4B

Topic: Air Pollution

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Arfa Ahsan

4A

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Air pollution

Air pollution is caused by many factors such as:

1. vehicles/motorcycles

2. deforestation and forest fires

3. factories

Air pollution is dangerous and harms both humans and animals .Air pollution as well causes many diseases such as cancer , asthma , etc.

here are some things that we should do to help stop Air pollution:

1. Drive your car less and prefer to use cycles or public transport.

2. stop deforestation and start planting more trees.

3. Start using solar powered energy.

4. Use less energy.

Air pollution is bad and we must take a stop against this .

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air pollution is harmful because it can harm us by lung disease heart desease and cancer

ways to save pollution

use public transportion and walk or use the bike for small trips and stop thorwing plastic on the ground and use renewable energy

and plant trees

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Name : Abdul Hakim Anas

Grade : 4

Section: C

Pollution happens when dirty and harmful things, like trash, smoke, or chemicals, get into our air, water, and land. Pollution makes the Earth unhealthy for people, animals, and plants. .

We can help stop pollution by keeping our environment clean, using less plastic, planting trees, and taking care of nature.

"Don’t Be Mean, Keep the Earth Clean!

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Types of Pollution Science Poster in Green Orange Flat Graphic Style

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Name: Aleena Sehr Mahdeen

Class: 4

Section: E

Topic: Noise Pollution

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Air pollution causes: Smoke from vehicles, harmful gases from industrial factories,

Forest fires and smoking.

Effects of air pollution: The effects of air pollution are asthma, lung disease and cancer.

Some ways how we can protect the air

from pollution: we can use 1 bus instead

of using 30 cars this reduse less harmful

gases from cars and And we should not smoke.

Mohammad Farzad areez:4A

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Name:Mahdieea Mahmud Maanha

Section:4D

Topic:Water Pollution

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Reduce water pollution (please watch the full video)

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Blue Yellow Bold and Bright Save the Ocean Animated Video

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Stop polluting oceans, rivers, lakes and seas or many underwater creatures might die!

Name: Khwaja Ayaan Rahman

Topic: Water pollution

Date:17.2.25

Class:4E

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Stop water pollution! - Khwaja Ayaan Rahman

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Air pollution :

Air pollution is the presence of harmful substances in the air that can cause damage to human health, the environment, and the climate. It is mainly caused by human activities, although natural processes can contribute as well.

Causes of Air Pollution:

1. Vehicle Emissions: Cars, trucks, and buses release large amounts of carbon monoxide, nitrogen oxides, and particulate matter.

2. Industrial Activity: Factories and power plants burn fossil fuels, releasing pollutants like sulfur dioxide, carbon dioxide, and volatile organic compounds.

3. Agricultural Practices: The use of pesticides, fertilizers, and livestock production can release methane, ammonia, and other pollutants into the air.

4. Burning of Fossil Fuels: Coal, oil, and natural gas used for energy production release carbon dioxide and other pollutants into the atmosphere.

5. Waste Disposal: Open burning of waste and landfills can release toxic gases and particulate matter into the air.

How to Stop Air Pollution:

1. Switch to Renewable Energy: Reducing reliance on fossil fuels and using solar, wind, and hydroelectric power can significantly cut down emissions.

2. Promote Public Transportation: Encouraging the use of buses, trains, and cycling reduces the number of vehicles on the road, lowering pollution levels.

3. Enforce Stricter Regulations: Governments can impose stricter emission standards on industries and vehicles to limit harmful pollutants.

4. Raise Awareness: Educating the public about the health risks of air pollution and the importance of reducing emissions can lead to more sustainable behaviors.

Four Precautionary Measures To Prevent Air Pollution Are As Follows :

1. Plant Trees and Greenery: Trees absorb carbon dioxide and other pollutants, improving air quality.

2. Reduce Waste and Recycle: Recycling and reducing waste can prevent harmful substances from being released into the air through landfills and incineration.

3. Use Eco-friendly Products: Using non-toxic cleaning agents, paints, and household items reduces the number of harmful chemicals released into the air.

4. Limit Use of Fossil Fuels: Use energy-efficient appliances, reduce heating and air conditioning needs, and switch to cleaner alternatives like electric cars to decrease emissions.

By taking these steps, we can help improve air quality and reduce the harmful effects of pollution on our health and the planet.

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Green Illustrative Clean Air for Future Generations Poster

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{Air Pollution}

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Green Illustrative Clean Air for Future Generations Poster

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Sharthok Meerab 4-C

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Pollution in Ocean, by Wahaz Bin Zafar, 4C

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Pollution in Ocean, by Wahaz Bin Zafar, 4C

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A significant portion of ocean pollution consists of plastic waste. Millions of tons of plastic end up in the ocean each year, affecting marine animals that may ingest or become entangled in the debris. Plastic breaks down into smaller microplastics, which can be ingested by a wide variety of marine species, entering the food chain.

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Ok?

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Name:Mahdieea Mahmud Maanha

Section:4D

Topic:Water Pollution

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Ziyad Faisal

4C

Topic: Air Pollution

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Small changes can make a big impact! Using biodegradable products, recycling, and reducing plastic waste can prevent pollution. Every action counts!

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This is my pollution animation I made it by Canva which I don't use so the quality can be a little bad And I am extremely sorry for a late submission by a few hours 😉😉

Khwaja Raid

Grade:4

Section:C

Hope u guys like the vid/animation

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Here are some things we can do to prevent water pollution! <3

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Name: Ruhani Islam

Class:4D

Topic:Water Pollution

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stop throwing plastics in the ocean save the turtles

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Name: Faizah Muzahid

Class: 4C

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Clean water is the best solution; try to keep it away from pollution

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Clean water is the best solution; try to keep it away from pollution

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Amima Zuhaira

4B

Topic: Water Pollution

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Switch from a continuously flowing water hose to a water-filled bucket when washing your car or bike

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Precautionary Measures to Reduce Water Wastage and Pollution

SM Zuhaib Faraj

Grade: 4A

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Md. Nubaid Islam

4D

Air Pollution: Causes and Solution

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Green Illustrative 3 Ways to Stop Air Pollution Poster

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Water pollution harms ecosystems, threatens health, and endangers future generations. Protect water, protect life.

Zarif 4E Water pollution took me 7 hours sir I think I have brain damage.

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Green and Yellow Minimalist Say No to Plastic Instagram Post

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Name: Manzoor Mehrang Sheikh

Grade & Sec: 4B

Topic: Air Pollution

If you can't plant a thousand trees, just plant one. As the great Carl Sagan said, " And I quote, The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand. So, save our home, Earth

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Name: Raoner Shoyeb Rowel, Grade/Section: 4E,Topic: Sea Pollution

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Plastic pollution harms marine life, disrupts ecosystem, and contaminates the food chain. protecting our oceans is essential.

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Ayushi Debnath

Class: 4D

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We should stop air pollution.Air pollution is very harmful in our body.

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Steps toward a cleaner and healthier city!

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We have got only one EARTH🌏. Be the cure.  Stop🛑 the pollution.

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We have got only one EARTH🌏. Be the cure.  Stop🛑 the pollution.

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Together we can do it!!

Anjanaa Venkadesh

4A

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Stop Air Pollution, digital poster drawn.

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Air Pollution, make a clean future to breathe.

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Air Pollution, make a clean future to breathe.

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Name: Humaira Tasnim

Class: 4B

Topic: Air Pollution

Ibis paint X

Air pollution is one of the major issues that affects not only Bangladesh, but also many other places in the world. It causes health problems and respiratory diseases, asthma, lung cancer, and pneumonia etc.

Bacteria from waste disposal have the potential to release germs in the air, which can cause pneumonia. Smoke and haze reduce visibility and makes people’s heads ache. Some main sources of air pollution are from factories burning fossil fuels, wood burning fires and motor vehicles. It can begin wildfires due to the smoke and ash.

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Name: Nameer Alam

Class: 4E

Topic: Air pollution

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Munira Binte Radwan (4-D)

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Name :Tahmid Ahmad

Grade : 4B

Topic : Environmental Sustainability, Pollution

With animation

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NAME:WAFIQ NEWAZ AYDIN

4D

DATE OF SUBMISSION :13/2/25

TOPIC:PLASTIC POLLUTION

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Reduce Vehicle Emissions

Use public transportation or carpool to reduce the number of cars on the road.

Drive fuel-efficient or electric vehicles to minimize emissions.

Walk or bike for short trips to reduce dependency on cars.

2. Switch to Clean Energy Sources

Use renewable energy sources like solar, wind, or hydroelectric power instead of coal or gas.

Support policies that encourage clean energy development.

3. Promote Energy Efficiency

Conserve energy by turning off lights and electronics when not in use.

Use energy-efficient appliances and ensure homes are properly insulated.

Opt for LED bulbs and energy-saving devices.

4. Reduce Industrial Emissions

Support businesses that adopt green technologies and practices.

Enforce stricter regulations on industrial emissions to limit pollution.

Encourage companies to invest in cleaner production methods and use sustainable materials.

5. Plant Trees and Green Spaces

Plant trees and create green spaces in urban areas to absorb carbon dioxide and produce oxygen.

Support urban gardening and green roofs to improve air quality.

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Name-Taifa Tariq

Grade-4E

Topic-Air Pollution

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4A

Topic: Water pollution

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Noise pollution in modern city and some precautions against it.

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Name: Saqif

Class: 4B

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We should all take care of our surroundings for better futire.

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save our earth

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NAME: UMAIZA AZAD

GRADE AND SECTION:4B

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STOP POLLUTING THE WATER!

It kills more than 1,400 peoples a year.

It kills the sea creatures and many more.

Everyday 2 million tons of sewage are disposed in the water.

Aaban Intaj Chowdhury, Class:4B

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Name: Nameer Aswad

Class: 4C

Topic: Air Pollution

Date: 13.02.25

According to the recent Air Quality Index (AQI), our county's air is highly polluted, making it unhealthy to breathe. We must act immediately to take action against air pollution.

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ADYAN HOSSAIN KHAN

4A

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Stop polluting the clear blue water. Stop hurting adorable sea animals. Save the turtles, save the corals.

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Stop water pollution. Save the water animals

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Stop water pollution. Save the water animals

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Azfar Nakib

Class-4D

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Name; Rumaisa azmi huda

Class;4

Sec;b

Topic; Plastic Pollution

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A solution for reducing plastic pollution

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Name: ROSHAN

GRADE:4B

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Topic Air pollution

Atifa Ahona Sharmin

4C

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Farzad Amin Raviv

4C

Topic: Air Pollution

miss delete the other two i cant

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Air Pollution isn't a subject schools teach us for nothing, around 25% of the pollution die of air pollution every year. Class 4A the date I submitted this on 12th February 2025.

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GO GREEN FOR A BETTER TOMORROW!                                                                               

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Name: Afsheen Jehan Altaf, Grade:04-D, Date of submission:12/02/2025,

Topic: Waste Management

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Cream and Blue llustrative Waste Disposal Steps Infographic Poster

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Name: Ebada Sharfaa Chowdhury

Grade: 4

Section: B

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Topic:AIR Pollution. :SAWBAN Grade 4E

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Use public transportation, bicycle or walk whenever possible to reduce the number of vehicles on the road.

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WE ONLY HAVE ONE LIFE AND ONE EARTH. SO, WE MUST CLEN THE EARTH'S OCEANS SO THAT WE CAN LIVE A HEALTHY LIFE.

GIS- 4C AAHIR

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Blue Illustrative Let's Save Our Sea Poster

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TASHRIQ JAHAN

CLASS: 4(A)

Air pollution harms health, causing respiratory diseases and climate change. Major pollutants include vehicle emissions, industrial waste, and deforestation. To reduce it, use public transport, adopt clean energy, plant trees, and enforce strict environmental laws. Switching to electric vehicles and reducing waste can also help create cleaner air for future generations.

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class/sec: 4C

Name: Shanaya Manha Alam

Date: 12.2.25

Topic: Land and waste pollution

Hope all of you enjoy this I added my own points.

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Name: Abdul Hakim Anas

Section : 4 C

Topic: Air pollution

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Beige Illustrative Stop Air Pollution Poster

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lets try to go green or or go home

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Name: Mirza Ayat Hossain

Class: 4-B

Topic: Air Pollution

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Name: Zuhayer Hossain

Section: 4D

Topic: Air Pollution

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Name: Aneeza Hossain

Section: 4B

Topic: Improper Waste Management

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Topic: Types of Pollution

Date: 12-02-25