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CBSE Class 9 Life on Earth — practice questions — page 2

Explore 93 free Life on Earth questions in CBSE Class 9 Social Science. Open each question or exercise to read its content, reference answers and available explanation.

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Life on Earth questions and exercises with answers

Showing questions 31–60 of 93.

Which rainforest layer holds the towering tallest trees?Read the answer and worked solution →Why is the rainforest floor sparse in plants?Read the answer and worked solution →Which description fits a savanna biome?Read the answer and worked solution →In a savanna, most of the rain falls in how much of the year?Read the answer and worked solution →Roughly what share of Earth's land area do savannas cover?Read the answer and worked solution →Unlike prairies and steppes, savannas are mostly found in areas with what?Read the answer and worked solution →What mainly defines a desert?Read the answer and worked solution →About what fraction of Earth's land surface is arid or semi-arid?Read the answer and worked solution →Why are polar regions sometimes counted as deserts?Read the answer and worked solution →How do desert rocks break into pieces?Read the answer and worked solution →Which feature helps desert plants survive?Read the answer and worked solution →How do many desert animals avoid the day's heat?Read the answer and worked solution →What do annual desert plants do after rainfall?Read the answer and worked solution →What is one cause of desertification in semi-arid land?Read the answer and worked solution →What have oases offered desert peoples?Read the answer and worked solution →How many biosphere reserves does India have?Read the answer and worked solution →Which UNESCO programme lists the world network of biosphere reserves?Read the answer and worked solution →The buffer zones of a biosphere reserve are open to what?Read the answer and worked solution →Which mountain range holds the Nilgiri Biosphere Reserve?Read the answer and worked solution →In which year was the Nilgiri Biosphere Reserve established?Read the answer and worked solution →Nilgiri Biosphere Reserve spreads across which three states?Read the answer and worked solution →The word Nilgiri comes from a Tamil word meaning which colour?Read the answer and worked solution →Which flowering shrubs are thought to have given the Nilgiris their name?Read the answer and worked solution →What kind of forest is the Sundarbans?Read the answer and worked solution →The Sundarbans lie where the Ganges and Brahmaputra meet which other river?Read the answer and worked solution →Which of these is among the most abundant Sundarbans trees?Read the answer and worked solution →Which cyclone devastated the Sundarbans in May 2009?Read the answer and worked solution →A nature reserve is a protected area important for what?Read the answer and worked solution →Which basin holds the largest tropical rainforest in South America?Read the answer and worked solution →Which grassland type has scattered trees and big animals like lions?Read the answer and worked solution →

Worked practice questions

Which rainforest layer holds the towering tallest trees?

  1. Emergent layer
  2. Forest floor
  3. Canopy layer
  4. Understory layer
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Correct answer: A. Emergent layer

The emergent layer is the top tier, where a few giant trees rise above the canopy.

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Why is the rainforest floor sparse in plants?

  1. Soil is far too salty
  2. Animals eat every seedling
  3. Little light reaches it
  4. Cold winds blow all day
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Correct answer: C. Little light reaches it

Dense layers above block sunlight, so little reaches the ground to support plants.

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Which description fits a savanna biome?

  1. A bare sandy desert waste
  2. A frozen treeless plain
  3. A dense evergreen forest
  4. Grass with scattered trees
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Correct answer: D. Grass with scattered trees

A savanna blends grassland with scattered trees, forming a grassy woodland.

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More Social Science topics

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