CBSE Class 10 Science Our Environment Quiz 2

1. Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the

A food web B ecological pyramid C ecosystem D food chain

2. In the given Figure the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available?
MCQ Questions for Class 10 Science Chapter 15 Our Environment with Answers

A T₄ B T₂ C T₁ D T₃

3. Which group of organisms are not the constituents of a food chain?

A (i) and (iii) B (iii) and (iv) C (ii) and (iii) D (i) and (iv)

4. The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about

A 1% B 5% C 8% D 10%

5. Which of the statements is incorrect?

A All green plants and blue green algae are producers B Green plants get their food from organic compounds C Producers prepare their own food from inorganic compounds D Plants convert solar energy into chemical energy

6. The decomposers in an ecosystem

A convert inorganic material, to simpler forms B convert organic material to inorganic forms C convert inorganic materials into organic compounds D do not breakdown organic compounds

7. Disposable plastic plates should not be used because

A they are made of materials with light weight B they are made of toxic materials C they are made of biodegradable materials D they are made of non-biodegradable materials

8. What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger

A The population of tiger increases B The population of grass decreases C Tiger will start eating grass D The population of tiger decreases and the population of grass increases

9. When is the world environment day celebrated?

A 16 June B 5 December C 5 June D 5 July

10. Which of these is a greenhouse gas?

A Hydrogen sulphide B Methane C Ozone D Carbon monoxide