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Life on Earth: CBSE Class 9 Geography practice questions

Practise 50 questions on Life on Earth, free, with an explanation for each answer.

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Sample questions

The chapter imagines our planet as a giant patchwork quilt (a blanket made of many patches). Each patch is a biome. The word comes from the Greek word bios. What does bios mean?

A patchwork quilt in which every patch shows a different natural landscape
  1. Land
  2. Life
  3. Weather
  4. Water
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B. Life

Bios means life, and -ome is a suffix used in biology for a group of a specific type of biological constituents. A biome is a large natural region where certain plants and animals live under similar climatic conditions, such as icy tundras, hot deserts, green forests and vast grasslands. Land, weather and water shape biomes, but none of them is the meaning of bios.

The Tropic of Cancer is at 23.5∘23.5^\circ N and the Tropic of Capricorn is at 23.5∘23.5^\circ S. Tropical rainforests are found in the belt between them. How many degrees of latitude wide is this belt?

A globe with five labelled lines of latitude and soft landmasses
  1. 0∘0^\circ
  2. 23.5∘23.5^\circ
  3. 66.5∘66.5^\circ
  4. 47∘47^\circ
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D. 47∘47^\circ

Latitudes on opposite sides of the Equator add up: 23.5∘+23.5∘=47∘23.5^\circ + 23.5^\circ = 47^\circ Getting 0∘0^\circ means subtracting as if both were on the same side; 23.5∘23.5^\circ counts only one half of the belt; and 66.5∘66.5^\circ (90∘−23.5∘90^\circ - 23.5^\circ) is the latitude of the Arctic and Antarctic Circles, not the width of the tropical belt.

This grassland has scattered trees. Large animals such as lions, elephants and giraffes live here. What is it called, and where is the chapter's example of it found?

Tall dry grass with a few flat-topped trees and a giraffe
  1. Savanna, in Africa
  2. Prairie, in North America
  3. Steppe, in Asia
  4. Tundra, near the Arctic
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A. Savanna, in Africa

Tropical grasslands, called savannas (as in Africa), have scattered trees and large animals like lions, elephants and giraffes. Prairies (North America) and steppes (Asia) are temperate grasslands with fertile soil, often used for farming. Grasslands grow where rainfall is moderate: not enough for dense forests. They support grazing animals, agriculture and livestock rearing.

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