alleryStart learning →What are very tiny pieces of plastic in water called?
- Minerals
- Microbes
- Microplastics
- Pebbles
Show answer and solution
Correct answer: C. Microplastics
Tiny bits of plastic that are hard to see are called microplastics.
Olympiad (Class 4) Our Environment — practice questions — page 2
Explore 50 free Our Environment questions in Olympiad (Class 4) Science. Open each question or exercise to read its content, reference answers and available explanation.
Practise Our Environment with Quill →Our Environment questions and exercises with answers
Showing questions 31–50 of 50.
What are very tiny pieces of plastic in water called?Read the answer and worked solution →Washing which cloth can shed tiny plastic bits into water?Read the answer and worked solution →Drinking polluted water can cause what?Read the answer and worked solution →Which harmful rain forms when factory gases mix with water in the air?Read the answer and worked solution →What do people build across a river to store water?Read the answer and worked solution →Cutting down large areas of forest is called what?Read the answer and worked solution →Protecting many different kinds of living things is called protecting what?Read the answer and worked solution →What is an endangered animal?Read the answer and worked solution →Why do countries set up nature reserves?Read the answer and worked solution →Burning coal and petrol adds gases that slowly heat the Earth. What is this called?Read the answer and worked solution →Which gas in air traps heat and adds to warming?Read the answer and worked solution →Which sign shows that a thing is alive?Read the answer and worked solution →Which one is NOT a natural body of water?Read the answer and worked solution →Fish in a pond die after a factory pipe starts pouring warm water into it. What is the best fix?Read the answer and worked solution →Raju throws a plastic wrapper into a river. What problem can this cause?Read the answer and worked solution →Which waste can safely go into a compost pit?Read the answer and worked solution →What keeps the layer of air around the Earth in place?Read the answer and worked solution →Clouds can be seen because air holds what?Read the answer and worked solution →Which chemicals used on farms kill insects and can end up in water?Read the answer and worked solution →What is the dirty water from toilets and drains called?Read the answer and worked solution →
Worked practice questions
Washing which cloth can shed tiny plastic bits into water?
- Cotton
- Wool
- Silk
- Nylon
Show answer and solution
Correct answer: D. Nylon
Nylon is made from plastic-like fibre, and it sheds tiny plastic bits when washed.
Drinking polluted water can cause what?
- Stomach illness
- A taller body
- A sunburnt skin
- Stronger bones
Show answer and solution
Correct answer: A. Stomach illness
Dirty water can carry germs that cause stomach illnesses.
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