Page 131 - Ripples SCIENCE 7 - TEJPUR Edition 2024 Answer Key

4. ...................... are frequent in India.

Ans. Cyclones
5. A ...................... is a violent spinning storm in the shape of a dark funnel with a narrow

end on the land.
Ans. tornado

6. Cyclones rotate ...................... in the Northern hemisphere and ...................... in the

Southern hemisphere.
Ans. clockwise, anticlockwise

7. In Americas, a cyclone is called a ................. . In Japan and Philippines, it is called a
............... .

Ans. hurricane, typhoon
8. In 2020, Maharashtra and West Bengal were hit by .................. and ..................

cyclones respectively, which cause large-scale loss to life and property.

Ans. Nisarga, Amphan
C. State whether the following statements are true (T) or false (F).

1. In winter, the winds flow from the land to the ocean.
2. Wind movement is monitored using satellites.

3. The greater the difference in air, the faster the air moves.
4. Lightning is an electric current.

5. The coastline of India is not vulnerable to cyclones.

6. During daytime, we have land breeze and at night, sea breeze.
7. Farmers in our country depend mainly on cyclones for their harvests.

8. The word monsoon is derived from mausim meaning season.
Ans. 1. (T) 2. (T) 3. (T) 4. (T) 5. (F) 6. (F) 7. (F) 8. (T)

D. Match the following.
Column A Column B

1. High wind speed (a) Rises up

2. Wind current (b) Exerts pressure
3. Hot air (c) Uneven heating of land

4. Atmosphere (d) Reduced air pressure
5. Air pressure (e) Decreases with increase in temperature

Ans. 1. (d) 2. (c) 3. (a) 4. (b) 5. (e)
E. Very short-answer questions

1. What is an anemometer?
Ans. An anemometer is a device used to measure wind speed.

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