Our Environment MCQ Chapter 15 NCERT Class 10 Science

Our Environment MCQ/Objective question Chapter 15 NCERT Class 10 Science

1. The interaction of components of the environment constitutes a:

  • a. Ecosystem.
  • b. Biome.
  • c. Biosphere.
  • d. None.

  • a. Ecosystem.

2. The components of an ecosystem is/are:

  • a. Biotic
  • b. Abiotic.
  • c. Both.
  • d. None.

  • c. Both.

3. Biotic components of an ecosystem include:

  • a. All bacterium.
  • b. All animals.
  • c. All plants.
  • d. All living organisms.

  • d. All living organisms.

4. Abiotic components of an ecosystem include:

  • a. Soil.
  • b. Weather.
  • c. Temperature.
  • d. Every physical factor present in that ecosystem.

  • d. Every physical factor present in that ecosystem.

5. An ecosystem of an aquarium in the house is a:

  • a. Natural.
  • b. Human-made.
  • c. None.

  • b. Human-made.

6. A pond ecosystem may be:

  • a. Natural.
  • b. Human-made.
  • c. any of the above, depending on its creation.

  • c. any of the above, depending on its creation.

7. Universal producer in an ecosystem is:

  • a. Plant.
  • b. Animal.
  • c. Fungi.
  • d. Algae.

  • a. Plant.

8. Universal decomposer in an ecosystem is:

  • a. Plant.
  • b. Animal.
  • c. Fungi.
  • d. Algae.

  • c. Fungi.

9. Universal producer in an ecosystem is:

  • a. Plant.
  • b. Animal.
  • c. Fungi.
  • d. Algae.

  • a. Plant.

10. A food chain is a series of interacting organisms in the ecosystem that depend on others for their nutrition. The organism in a food chain can be:

  • a. Any organism that gets nutrition from others.
  • b. Only animals.
  • c. Only plants.
  • d. Only humans.

  • a. Any organism that gets nutrition from others.

11. Which among these may be an aquatic food chain :

  • a. Small Fish » Big fish » Bear.
  • b. Aquatic plant » fish» Bigger fish » Shark.
  • c. Plant » cow » Lion.
  • d. None.

  • b. Aquatic plant » fish» Bigger fish » Shark.

Our Environment MCQ
Trophic levels

12. Levels in a food chain make a :

  • a. Food web.
  • b. Trophic level.
  • c. Food level.
  • d. None.

  • b. Trophic level.

13. Ultimate source of energy in an ecosystem is:

  • a. Plants.
  • b. Animals.
  • c. Human.
  • d. The Sun.

  • d. The Sun.

14. Animals get their nutrition from plants or other animals, which eventually thrives on the plant. So, the plant is a:

  • a. Primary consumer
  • b. Primary producer.
  • c. Both.
  • d. None.

  • a. Primary consumer

15. Which among these can be a primary consumer:

  • a. Humans
  • b. Lion.
  • c. Snakes.
  • d. Cow.

  • d. Cow.

16. Human is a _ _ _ consumer.

  • a. Top
  • b. Bottom.
  • c. Middle level.
  • d. None.

  • a. Top

17. Plants trap what percentage of energy provided by the sun?

  • a. 1%.
  • b. 2%.
  • c. 10%.
  • d. 50%.

  • a. 1%.

18. Only around _ _ _ % energy of a trophic level is available to the next trophic level.

  • a. 1%.
  • b. 2%.
  • c. 10%.
  • d. 50%.

  • c. 10%.

food web diagram19. Organisms of one food chain are also members of other food chains. To represent all of them we use:

  • a. Multiple food chains.
  • b. Food web.
  • c. Food net.
  • d. Food network.

  • b. Food web.

20. The flow of energy in an ecosystem is:

  • a. Sunlight » Herbivore » Producer » Carnivore.
  • b. Sunlight » Producer » Herbivore » Carnivore.
  • c. Sunlight » Carnivore » Producer » Herbivore.
  • d. Sunlight » Herbivore » Carnivore » Producer.

  • c. Sunlight » Carnivore » Producer » Herbivore.

21. A top carnivore among these is:

  • a. Hen eating worms.
  • b. Cat preying hen.
  • c. Lion killing deer.
  • d. A mongoose preying a snake.

  • c. Lion killing deer.

22. Which light in the upper atmosphere produces oxygen free radical which make the ozone layer:

  • a. Infrared.
  • b. Ultraviolet rays.
  • c. Blue light.
  • d. Red light.

  • b. Ultraviolet rays.

23. Synthetic chemicals like breaks the ozone molecule. Which among these are CFC?

  • a. Chloro-fluoro-carbon (CFC)
  • b. Methane.
  • c. Petroleum products.
  • d. All.
  • a. Chloro-fluoro-carbon (CFC)


See also:

Sources of Energy MCQ.

Heredity and Evolution MCQ.

Life Processes MCQ Chapter 6.

How do Organisms Reproduce MCQ?

Control and Coordination MCQ.

Chemical Reactions and Equations MCQ.

Answer:

1.a11.b21.c
2.c12.b22.b
3.d13.d23.a
4.d14.a
5.b15.d
6.c16.a
7.a17.a
8.c18.c
9.a19.b
10.a20.c

 

Ref: Chapter 15, NCERT.

Our Environment MCQ/Objective question Chapter 15 NCERT Class 10 Science

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