Our Environment Quiz - CBSE Class 10 Science

Free practice quiz: Our Environment (CBSE Class 10 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 10 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. Which of the following is a biodegradable waste?

   1. Plastic
   2. Glass
   3. Wood
   4. Metal
   Show answer

   Answer: C. Wood

   Wood is an organic material that decomposes naturally, making it biodegradable.

2. What term is used to describe the variety of life on Earth?

   1. Ecology
   2. Biodiversity
   3. Biome
   4. Population
   Show answer

   Answer: B. Biodiversity

   Biodiversity refers to the variety of all life forms on Earth.

3. What is biomagnification?

   1. The increase in biomass
   2. The increase in population
   3. The increase in toxin concentration in organisms
   4. The decrease in carbon levels
   Show answer

   Answer: C. The increase in toxin concentration in organisms

   Biomagnification is the process where the concentration of toxins increases as they move up the food chain.

4. How does a food chain differ from a food web?

   1. Food chains are complex while food webs are simple
   2. Food webs consist of multiple interconnected chains
   3. Food chains have no energy transfer
   4. Food webs only involve plants
   Show answer

   Answer: B. Food webs consist of multiple interconnected chains

   A food web is a system of interconnected food chains, showing multiple energy pathways in an ecosystem.

5. What trophic level are herbivores assigned to?

   1. Producers
   2. Primary consumers
   3. Secondary consumers
   4. Tertiary consumers
   Show answer

   Answer: B. Primary consumers

   Herbivores are primary consumers as they feed directly on producers (plants).

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the primary source of energy for the ecosystem?
2. What happens to energy as it moves through a food chain?
3. Which of the following is NOT a greenhouse gas?
4. Which organisms are primarily responsible for nitrogen fixation?
5. Which type of ecosystem is characterized by low precipitation and sparse vegetation?
6. Which is an example of an abiotic factor affecting an ecosystem?
7. In a food web, what do the arrows represent?
8. Which process in plants converts light energy into chemical energy?
9. What role do decomposers play in an ecosystem?
10. What is the main process through which carbon is returned to the atmosphere from living organisms?
11. Which of the following shows the process of energy flow in an ecosystem?
12. What is an ecological niche?
13. How are humans impacting the phosphorus cycle in ecosystems?
14. Why is biodiversity important for ecosystem stability?
15. What is ecological succession?

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