NCERT Class VII Science Solutions: Chapter 8-Winds, Storms and Cyclones Part 1

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Question 1:

Fill the missing word in the blank spaces in the following statements:

  1. Wind is __________ air.

  2. Winds are generated due to __________ heating on the earth.

  3. Near the earth’s surface __________ air rises up whereas ___________ air comes down.

  4. Air moves from a region of __________ pressure to a region of __________ pressure.

Answer:

  1. Wind is moving air.

  2. Winds are generated due to uneven heating on the earth.

  3. Near the earth’s surface warm air rises up whereas cooler air comes down.

  4. Air moves from a region of high pressure to a region of low pressure.

Question 2:

Suggest two methods to find out wind direction at a given place.

Answer:

The following methods can be used to get the direction of wind:

  • Take some fine and lighter sand in your hand and slowly slip it off. Movement of dust particles in a particular direction will give the direction of wind flowing.

Image result for fine and lighter sand in your hand and slow …

Result for Fine and Lighter Sand in Your Hand and Slowly Sli …

  • Fly a kite. In the direction the kite flies shall be the wind direction.

As showing in images is a direction the kite flies shall be …

In the Direction the Kite Flies Shall be the Wind Direction

  • Take bit of paper on your palm. The piece will fly in the direction of wind is blowing.

As showing in images is a fly in the direction of wind is bl …

Fly in the Direction of Wind is Blowing

  • Use anemometer or wind wane.

Image result for anemometer

Result for Anemometer