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Class 10

Explore popular questions from Our Environment for Class 10. This collection covers Our Environment previous year Class 10 questions hand picked by experienced teachers.

Our Environment

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Q 1. Products which can be broken down by action of bacteria or other saprophytes are

A

Non-biodegradable

Biodegradable

C

Both

D

None of these

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Q 2. Biotic and abiotic components together consist

A

Ecology

Ecosystem

C

Environment

D

None of these

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Q 3. Garden and crop fields are examples of

A

Natural ecosystem

Artificial ecosystem

C

Food web

D

Food chain

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Q 4. Each step or level of the food chain forms

trophic level

B

top level

C

bottom level

D

none of these

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Q 5. What shields the surface of the earth from ultraviolet(UV) radiation?

Ozone layer

B

Lithosphere

C

Water layer

D

Atmosphere

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Q 6. Ultraviolet radiation can cause

A

Diabeties

B

Blood cancer

Skin cancer

D

Cough and cold

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Q 7. Plants and Animals are

Biotic components

B

Abiotic components

C

Both (A) and (B)

D

None of these

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Q 8. Each step or level of the food chain forms a trophic level. The autotrophs comes at which trophic level

First

B

Second

C

Third

D

Fourth

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Q 9. Is their is some loss of energy in environment occurs when energy is transferred from autotrophs to heterotrophs.

Yes, 90% energy is lost

B

10% energy is lost

C

Energy is gained

D

None of these

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Q 10. With how many atoms of oxygen one molecule of ozone is formed

A

Two

Three

C

Four

D

Eight

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Q 11. Ozone shields the surface of earth from

A

Gamma radiations

Infrared Radiation

C

Ultra-violet radiations

D

Nuclear radiations

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Q 12. Detergent is the examples of substances that are

A

Biodegradable

Non-biodegradable

C

Ecofriendly

D

Both (A) & (B)

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Q 13. The substances which can be easily degraded by bacteria or other sparophytes are

Biodegradable

B

Non-ecofriendly

C

Non-biodegradable

D

None of these

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Q 14. Garden and crop-field are example of

Artificial ecosystem

B

Natural ecosystem

C

Aquatic ecosystem

D

None of these

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Q 15. Organisms which can prepare their own food are

A

Consumers

Producers

C

Parasites

D

None of these

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Q 16. By which process producers like plants and blue green algae produce their food

Photosynthesis

B

Digestion

C

Both (A) & (B)

D

None of these

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Q 17. Which of the following comes under consumers?

A

Herbivores

B

Carnivores

C

Parasite

All of these

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Q 18. The microorganisms that break down the complex organic substance into simple inorganic substance that go into the soil and are used up once more by plants are

A

Consumers

B

Producers

Decomposers

D

None of these

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Q 19. What percent can be taken as an average value for the amount of energy that reaches the next level of consumers.

A

30%

B

20%

10%

D

50%

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Q 20. Each organism is generally eaten by several other organism. So instead of a straight line food chain, the relationship can be shown as a series of branching lines called

A

World web

B

Consumers web

Food web

D

Decomposers web

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Q 21. Which of the following constitute a food-chain?

A

Grass, wheat and mango

Grass, deer and Lion

C

Goat, cow and elephant

D

Grass, fish and goat

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Q 22. The decrease of ozone in the atmosphere has been linked to synthetic chemical which is used as refrigerants and in fire extinguishers. This chemical is

Chlorofluorocarbons

B

Carbon monoxide

C

Carbon dioxide

D

None of these

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Q 23. In 1987, which programme succeeded in forging an agreement to freeze CFC production at 1986 level.

UNEP

B

UNGP

C

AEP

D

None of these

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Q 24. Which of the following are environment friendly practices?

A

Carrying cloth bags to put purchases in while shopping

B

Switching off unnecessary lights and fans

C

Walking to school instead of getting your mother to drop you on her scooter

All of the above

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Q 25. In food chain

Percent of energies transfer will be respectively

1, 10, 10

B

90, 10, 10

C

1, 1, 1

D

1, 10, 0