# NCERT Class 8 Science Chapter 13 Our Home: Earth, a Unique Life Sustaining Planet Solutions: In-Text and Exercise Questions Explained | SwaVid

Here are the questions and step-by-step solutions from Chapter 13, "Our Home: Earth, a Unique Life Sustaining Planet," of the new rationalised NCERT Cla...

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# Our Home: Earth, a Unique Life Sustaining Planet

## Find the gaps before this chapter finds them for you.

## Related chapters

Chapter 13 · Class 8 Science

Here are the questions and step-by-step solutions from Chapter 13, "Our Home: Earth, a Unique Life Sustaining Planet," of the new rationalised NCERT Class 8 Science textbook "Curiosity."

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In-text Questions (Probe and Ponder)

Answer: If there were no life on Earth, it would appear as a barren, lifeless planet, similar to Mars or Mercury. There would be no greenery, forests, animals, or humans. The landscape would be dominated by rocks, soil, mountains, deserts, and water bodies, devoid of any living activity. The atmosphere would also be significantly different, lacking the oxygen primarily produced by plants. [2]

End-of-Chapter Exercise (Keep the Curiosity Alive)

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- Imagine a planet without any plants, animals, or microorganisms. It would be a barren and desolate place.
- There would be no greenery, no forests, no animals, and no humans. The land would consist only of rocks, soil, mountains, deserts, and water bodies, without any living activity. [2]
- The atmosphere would also be very different. Oxygen, which is crucial for many life forms, is primarily produced by plants through photosynthesis. Without life, the atmospheric composition would lack significant oxygen. [2]
- The Earth would resemble other lifeless planets like Mars or Mercury, characterized by extreme temperatures and a lack of vibrant ecosystems.
- NCERT Class 8 Science textbook: Curiosity : Chapter 13: Our Home: Earth, a Unique Life Sustaining Planet

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