Class 8 Science — Chapter 13: Our Home: Earth, a Unique Life Sustaining Planet

What you'll learn

• ▸Earth as a Unique Life-Sustaining Planet
• ▸Comparison of Solar System Planets
• ▸The Greenhouse Effect
• ▸The Habitable Zone (Goldilocks Zone)
• ▸Importance of Earth's Size and Gravity
• ▸Role of the Atmosphere for Life
• ▸Potential for Life on Mars

Chapter Summary

--- PAGE 1 --- Our Home: Earth, a Unique Life Sustaining Planet 13 Probe and ponder • What do you think Earth would look like if there were no life on it at all? • Life on Earth has survived for billions of years. What allows it to keep going despite major changes and disasters? • Why don't dogs lay eggs? Or hens give birth to live chicks? • If a spaceship carried soil and water to Mars, could plants start growing there? Share your questions ____________________________________________________ ____________________________________________________? --- PAGE 2 --- Chapter 13 — Our Home: Earth, a Unique Life Sustaining Planet 211 We have now reached the final chapter of this book, the concluding chapter in our scientific journey through the middle stage. It is time to put together all that we have seen and learnt and try to understand why our home, planet Earth, is like no other place in the…

Practice Questions from this Chapter

Tap "Get Solution" on any question to ask our AI tutor.

1. Define greenhouse effect simply. Get Solution →
2. Compare Earth to other planets. Get Solution →
3. Explain why Earth has liquid water. Get Solution →
4. According to the text, what is Earth often called when viewed from space due to the vast amount of water on its surface? Get Solution →
5. Which planet in our solar system is identified as the hottest, primarily due to its thick atmosphere trapping heat? Get Solution →
6. What is the name of the zone around a star where the temperature allows water to exist in liquid form? Get Solution →
7. The thin, life-supporting layer on the surface of the Earth is compared to what part of an apple? Get Solution →
8. Which gas, present in Earth's atmosphere, is essential for respiration and also forms the protective ozone layer? Get Solution →

Did you know?

• 💡 Earth's atmosphere slowly leaks into space, losing about 90 tons of gas each day.
• 💡 Despite its vast oceans, less than 1% of Earth's water is freshwater available for drinking.
• 💡 One full day on Venus is longer than one full year on Venus.
• 💡 The Earth's crust is thinner under oceans than it is under continents.
• 💡 If a massive star replaced the Sun, Earth would quickly be swallowed by its expanding atmosphere.

Frequently Asked Questions

Related Chapters