NCERT Class8 Science Book Curiosity Chapter13 QA

By dk -

Chapter 13 : Our Home Earth, a Unique Life-Sustaining Planet

Questions and Answers (1 Mark)

  1. Question: What is the Earth?
    Answer: The Earth is a planet that supports life.

  2. Question: Name the planet on which we live.
    Answer: We live on the Earth.

  3. Question: What is the lithosphere?
    Answer: The lithosphere is the solid outer layer of the Earth.

  4. Question: What is the hydrosphere?
    Answer: The hydrosphere includes all water bodies on the Earth.

  5. Question: What is the atmosphere?
    Answer: The atmosphere is the layer of gases surrounding the Earth.

Questions and Answers (2 Marks)

  1. Question: Why is the Earth called a unique planet?
    Answer: The Earth is called a unique planet because it has air water suitable temperature and life-supporting conditions.

  2. Question: Name the three domains of the Earth.
    Answer: The three domains of the Earth are lithosphere hydrosphere and atmosphere.

  3. Question: What is the biosphere?
    Answer: The biosphere is the zone where land water and air interact to support life.

  4. Question: Why is water important for life?
    Answer: Water is important for life because all living organisms need water to survive.

Questions and Answers (5 Marks)

  1. Question: Explain the domains of the Earth.
    Answer: The Earth has three main domains. The lithosphere is the land surface of the Earth. The hydrosphere includes oceans rivers lakes and other water bodies. The atmosphere is the blanket of air around the Earth. These domains together support life on the planet.

  2. Question: Describe how the Earth supports life.
    Answer: The Earth supports life by providing air water food and suitable temperature. The atmosphere protects living beings from harmful rays. Water helps in growth of plants and survival of animals. Land provides space for living and growing food.

Fill in the Blanks (5 Marks)

  1. The Earth is the only known planet that supports life.
  2. The atmosphere protects the Earth from harmful rays.
  3. Oceans cover most of the Earth’s surface.
  4. The biosphere supports all living organisms.
  5. Land water and air together make life possible.

True or False (5 Marks)

  1. The Earth has only one domain.
    Answer: False.

  2. The atmosphere is important for life.
    Answer: True.

  3. The hydrosphere includes only oceans.
    Answer: False.

  4. The biosphere is the zone of life.
    Answer: True.

  5. The Earth is called our home planet.
    Answer: True.

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