Natural Resources part 8 (Rain: Cause and Importance) CBSE class 9 | Summary and Q&A

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March 20, 2017
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Natural Resources part 8 (Rain: Cause and Importance) CBSE class 9

TL;DR

Rain is formed when water evaporates, heats up the air, condenses into water droplets, and falls back to the ground. It is crucial for agriculture and provides fresh water for the survival of various life forms.

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Questions & Answers

Q: How is rain formed?

Rain is formed when water evaporates from water bodies, heats up the air, cools down, and condenses into water droplets that fall back to the ground.

Q: What causes water to evaporate and form water vapor?

The presence of the sun heats up water bodies, causing the water to evaporate and convert into water vapor.

Q: How do water droplets form clouds?

Water droplets condense onto dust particles in the atmosphere, gradually combining and growing larger, eventually forming clouds.

Q: Why does rain fall instead of staying in the clouds?

When water droplets in the clouds become heavy and dense enough, they fall to the ground as rain.

Summary & Key Takeaways

  • Rain is formed through the process of evaporation, where water converts into water vapor, heats up the air, condenses into liquid water droplets, and falls back to the ground.

  • Water bodies, such as oceans and lakes, heat up in the presence of the sun, causing the water to evaporate and mix with the air.

  • As the heated air rises, it cools down and causes condensation of the water vapor onto dust particles, forming water droplets, which eventually become rain.

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