Online Test of Chapter 14 Our Environment MCQ Class 10th Science

Questions :-

1. Components form the ecosystem are-
a)All biotic
b)All abiotic
c)Both (a) and (b)
d)None of these

2. What are the biotic components?
a)All living organisms
b)All non-living organisms
c)All organisms
d)None of these

3. Which of the following is a biodegradable substance?
a)Glass
b)Plants
c)Plastics
d)Polythene

4. Which of the following is a non-biodegradable substance?
a)Cow dung
b)Plastic
c)Manures
d)Plant producers

5.The functional unit of environment is known as
a)Environment
b)Ecosystem
c)Carbon
d)Oxygen

6. Green plants and algae are the example of
a)Producers
b)Composers
c)Decomposers
d)Only (a)

7. _______ is not a biodegradable pollutant.
a)Paper
b)Cotton cloth
c)Cotton
d)DDT

8. Which of the following is an example of herbivores?
a)Cow
b)Shark
c)Lion
d)Tiger

9. The food chain consists of
a)The sun
b)Producers
c)Consumers
d)All of the above

10. Ozone is a molecule formed by ………… atoms of oxygen.
a)One
b)Two
c)Three
d)Four

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