Our Environment Quiz - CBSE Class 5 Science

Free practice quiz: Our Environment (CBSE Class 5 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 5 Science practice quiz has 20 multiple-choice questions on Our Environment, and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is the main source of energy for the Earth?

   1. The Sun
   2. The Moon
   3. The Stars
   4. The Oceans
   Show answer

   Answer: A. The Sun

   The Sun is the primary source of energy for all life on Earth.

2. Why are trees called the 'lungs of the Earth'?

   1. Because they store air
   2. Because they produce oxygen
   3. Because they filter water
   4. Because they produce carbon dioxide
   Show answer

   Answer: B. Because they produce oxygen

   Trees absorb carbon dioxide and release oxygen, which is essential for life on Earth.

3. What is the term for the variety of life in a particular habitat?

   1. Population
   2. Biodiversity
   3. Ecosystem
   4. Community
   Show answer

   Answer: B. Biodiversity

   Biodiversity refers to the variety of living species in a habitat or ecosystem.

4. What role do bees play in our environment?

   1. Predators
   2. Decomposers
   3. Pollinators
   4. Prey
   Show answer

   Answer: C. Pollinators

   Bees are crucial pollinators, helping plants reproduce by transferring pollen.

5. Why is biodiversity important for ecosystem stability?

   1. It reduces resources
   2. It increases competition
   3. It ensures balance
   4. It permits extinction
   Show answer

   Answer: C. It ensures balance

   Higher biodiversity means ecosystems can better withstand changes and disturbances.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which of the following helps plants make their food?
2. What is the role of decomposers in the environment?
3. Which of the following is an example of a renewable resource?
4. Which of these is a non-renewable energy source?
5. How do plants contribute to the water cycle?
6. What happens if one part of a food web is removed?
7. How does deforestation impact global warming?
8. What is the primary function of roots in most plants?
9. Which of these is an abiotic component of an environment?
10. Which gas do plants absorb from the atmosphere during photosynthesis?
11. How do earthworms help improve soil health?
12. What is an effect of excessive use of fertilizers in agriculture?
13. What is one way human activity is reducing biodiversity?
14. How does climate change affect sea levels?
15. How can deforestation lead to desertification?

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