MCQ Chapter 2 Life on Earth Class 9 Social Science CBSE Board

1. What is a biome?

A small area containing only animals

A large natural region with specific plants and animals under similar climatic conditions

A region covered entirely by water

An area used only for agriculture

Question 1 of 20

2. The word ‘biome’ is derived from which Greek word?

Geos

Atmos

Bios

Hydros

Question 2 of 20

3. Which of the following best describes an ecosystem?

A region containing only plants

A geographical area without living organisms

A large region defined only by temperature

A community where plants, animals, and non-living things interact

Question 3 of 20

4. Which of the following is a major factor determining the type of biome found in a region?

Temperature and precipitation

Population size alone

Number of buildings

Type of transport available

Question 4 of 20

5. How are terrestrial biomes primarily classified?

Into rivers, lakes, and oceans

Into forests, grasslands, deserts, and tundra

Into villages, towns, and cities

Into mountains, roads, and industries

Question 5 of 20

6. Where are tropical rainforests mainly found?

Near the North and South Poles

Only in temperate regions

Near the Equator, between the Tropic of Cancer and the Tropic of Capricorn

Only in regions with very little rainfall

Question 6 of 20

7. Which climatic conditions are characteristic of tropical rainforests?

Long winters and permanently frozen soil

Very little rainfall throughout the year

Extremely cold temperatures and sparse vegetation

High temperatures and abundant rainfall throughout the year

Question 7 of 20

8. Where is the largest tropical rainforest region of South America located?

The Amazon Basin

The Thar Desert

The Himalayan region

The Gobi Desert

Question 8 of 20

9. Which of the following is a major tropical rainforest region in Africa?

The Sahara Basin

The Congo Basin

The Gobi Basin

The Thar Basin

Question 9 of 20

10. Why are tropical rainforests sometimes called gene banks?

They contain only commercially valuable trees

They are used exclusively for timber production

They preserve diverse genetic resources and unique genetic material

They have no interaction with other organisms

Question 10 of 20

11. What important role do forests play in maintaining the Earth's environment?

They prevent all natural disasters

They eliminate the need for rainfall

They increase desertification everywhere

They help maintain oxygen levels and balance the Earth's climate

Question 11 of 20

12. What is the main characteristic of a grassland biome?

Large open areas covered mainly with grasses and very few trees

Dense forests with trees growing close together

Land permanently covered with ice

Regions completely covered by seawater

Question 12 of 20

13. Why do grasslands generally develop in areas with moderate rainfall?

Moderate rainfall causes permanent freezing

Rainfall is insufficient to support dense forests

Moderate rainfall prevents all vegetation from growing

These regions receive no sunlight

Question 13 of 20

14. What are the tropical grasslands of Africa commonly called?

Taiga

Tundra

Savannas

Temperate deciduous forests

Question 14 of 20

15. Which of the following is an example of a temperate grassland in North America?

The Congo Basin

The Amazon Basin

The Sahara Desert

The Prairies

Question 15 of 20

16. Which characteristic makes temperate grasslands suitable for agriculture?

Fertile soil

Permanently frozen ground

Extremely sparse vegetation everywhere

Complete absence of rainfall

Question 16 of 20

17. Which animals are specifically associated with African tropical grasslands?

Polar bears, seals, and penguins

Lions, elephants, and giraffes

Whales, dolphins, and sharks

Reindeer, arctic foxes, and polar bears

Question 17 of 20

18. Which biome receives the least amount of rainfall?

Tropical rainforest

Temperate grassland

Desert

Wetland

Question 18 of 20

19. Which of the following is an example of a cold desert in Asia?

The Amazon Basin

The Congo Basin

The Andaman Islands

The Gobi Desert

Question 19 of 20

20. What is a distinctive feature of the Rann of Kutch?

It is a salt desert that becomes a marshy wetland during the monsoon

It remains permanently covered with snow

It is a dense tropical rainforest

It is a freshwater lake throughout the year

Question 20 of 20

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