Start learning →

CBSE Class 9 Life on Earth — practice questions

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.

Practise Life on Earth with Quill →

Life on Earth questions and exercises with answers

Showing questions 1–30 of 93.

The biosphere is best described as which of these?Read the answer and worked solution →Which geologist coined the term biosphere in 1875?Read the answer and worked solution →In 1935, which scientist brought in the term ecosystem?Read the answer and worked solution →With regard to energy, the biosphere is which kind of system?Read the answer and worked solution →Which sphere joins the biosphere in the geochemical model of the ecosphere?Read the answer and worked solution →Which process captures solar energy for the whole biosphere?Read the answer and worked solution →Biogenic graphite showing early life was found in 3.7 billion-year-old rocks from where?Read the answer and worked solution →About how long ago did the Earth form?Read the answer and worked solution →Which bird has been found flying as high as 11,300 metres?Read the answer and worked solution →What is the greatest known temperature at which microbial life can exist?Read the answer and worked solution →What most likely sets the limit of life deep underground?Read the answer and worked solution →On land, biomes are separated mainly by what?Read the answer and worked solution →How are land biomes inside the Arctic and Antarctic Circles described?Read the answer and worked solution →Which statement defines a biome?Read the answer and worked solution →Which 1964 to 1974 programme popularized the idea of a biome?Read the answer and worked solution →Which two abiotic factors did Holdridge treat as the main drivers of vegetation type?Read the answer and worked solution →What mainly hinders tree growth in a tundra?Read the answer and worked solution →Which of these is a recognised type of tundra?Read the answer and worked solution →Which plants make up typical tundra vegetation?Read the answer and worked solution →What is the boundary between tundra and forest called?Read the answer and worked solution →From which language does the word tundra come?Read the answer and worked solution →Which gases are stored in the permafrost of tundra soil?Read the answer and worked solution →Which other name is used for the taiga biome?Read the answer and worked solution →Which trees mainly form the taiga?Read the answer and worked solution →Which is the world's largest land biome?Read the answer and worked solution →Which tree forms the vast forest of eastern Siberia's taiga?Read the answer and worked solution →The taiga in its present form has existed for about how long?Read the answer and worked solution →Mean monthly temperatures in a tropical rainforest stay above which level all year?Read the answer and worked solution →Average annual rainfall in a tropical rainforest is at least about how much?Read the answer and worked solution →Why are rainforest soils often poor in nutrients?Read the answer and worked solution →

Worked practice questions

The biosphere is best described as which of these?

  1. The layer of gases around Earth
  2. The solid rock crust of Earth
  3. The sum of all ecosystems
  4. Only the water bodies of Earth
Show answer and solution

Correct answer: C. The sum of all ecosystems

The biosphere is the zone of life, made up of every ecosystem on the planet taken together.

Open this question →

Which geologist coined the term biosphere in 1875?

  1. Arthur Tansley
  2. Matthew Maury
  3. Eduard Suess
  4. Charles Darwin
Show answer and solution

Correct answer: C. Eduard Suess

Eduard Suess introduced the word to mean the place on Earth's surface where life dwells.

Open this question →

In 1935, which scientist brought in the term ecosystem?

  1. Leslie Holdridge
  2. Robert Whittaker
  3. Eduard Suess
  4. Arthur Tansley
Show answer and solution

Correct answer: D. Arthur Tansley

Arthur Tansley added climate and soil to the idea of living communities and called the result an ecosystem.

Open this question →

How to practise

  1. Choose a Life on Earth question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Life on Earth practice for CBSE Class 9. Read explanations as you go. No signup form needed to start.

Practise Life on Earth →

More Social Science topics

Elections and PoliticsDemocracy and AuthorityShaping of the Earth SurfaceBuilding Blocks in EconomicsClimate and GeographyResistance and Resilience (1000 to 1700 CE)Oceans and LifeEarly Humans and Civilisation