Question

Q.1 What is tornado?
Q.2 What is cyclone?
Q.3 Warm air is lighter than cold air. Do you agree? if yes, give reason.
Q.4 How are the pressure difference created in nature?
Q.5 Name the instrument which is used to measure the speed of wind.
Q.6 Why is it difficult to ride a bicycle while moving against the wind?
Q.7. What do you mean by high pressure area and low pressure area?
Q.8 Why does a closed tin can containing boiling water get crushed
when kept under a cold water tap?​

Answer 1

Answer:

1 A tornado is a rapidly rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. ... Waterspouts are characterized by a spiraling funnel-shaped wind current, connecting to a large cumulus or cumulonimbus cloud.

2 violent wind that moves in a circle causing a storm

3 Warm air is lighter than cold air. Because the cold air contains some of the molecules of water. But warm air doesn't contains any water droplets or dust particules. So warm air is lighter than cold air.

4In coastal areas, during daytime, there is a regular flow of cool air from the sea towards the land. Re-radiation of heat from land heats the air above it . ... The hot air rises and creates an area of low pressure.

5 anemometer

An anemometer is one of the tools used to

measure wind speed.

6 It is difficult to ride a bicycle against the direction of wind because the frictional force of wind creates an deceleration in motion of bicycle

7 High-pressure areas usually are areas of fair, settled weather. Low-pressure areas are places where the atmosphere is relatively thin. Winds blow inward toward these areas. This causes air to rise, producing clouds and condensation

8 When the hot can is plunged into cold water, the vapor condenses quickly, leaving a vacuum in most of the can. The resulting large discrepancy between the outside and inside air pressure leads to a large net inward force on the can, ending with its rapid crushing.

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