Question

1. Descriptive type questions
A. Short answer questions
1. Why does hot air rise? Give an example of hot air rising.
2. What property of air does a suction plunger use?
3. How can we tell the direction of the wind? Why is it important to have this information?
4. Which are the satellites that the Indian Meteorological Department uses, and for what purpose?
5. State the ways through which the Indian Meteorological Department issues weather alerts.
6. Why should people be careful about exposed electrical wires during a storm?
B. Distinguish between the following.
1. A local wind and a global wind
2. An anemometer and a weather vane
3. A thunderstorm and a dust storm​

Answer 1

Answer:

When fluids (liquids and gases) are heated, they expand and therefore become less dense. Any object or substance that is less dense than a fluid will float in that fluid, so hot water rises (floats) in colder water. When fluids are cooled, they contract and therefore become more dense.

Explanation:

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