NCERT Class 7 Science Chapter 8 Winds, Storms and Cyclones Extra Questions and Answers
Class 7 Science Chapter 8 Extra Questions and Answers – Winds, Storms and Cyclones. Here in this Page Class VII Students can Learn Extra Questions & Answer 8th Chapter Science fully Inside.
We Provided Here Winds, Storms and Cyclones Science Chapter 8 Long Answer Type Question, Very Short Type Questions (VSA) / MCQ Type Questions, Short Type Questions (SA).
Class 7 Science Chapter 8 Extra Question with Answer – Winds, Storms and Cyclones
Science Chapter 8 Winds, Storms and Cyclones Class 7 Inside 5 Marks, 3 marks, 2 Marks & And 1 Marks Important Questions and Answers.
1) Fill in the blanks:
a) Air ___ on heating. (Expands)
b) The diameter of the eye of the cyclone varies from ____. (10 to 30 km)
c) In Philippines and japan, a cyclone is known as ___. (Typhoon)
d) Uneven heating of land generates monsoon winds from ___ direction in summer. (Southwest)
2) Multiple choice questions:
a) The warm air is ___ than the cold air?
a) Heavier b) Lighter
Ans. b) Lighter
b) The cloud region of a cyclone is about ___ km in size?
a) 200 b) 300 c) 150
Ans. c) 150
c) Uneven heating of land generates winds from ___ direction in winter?
a) Northwest b) Southwest
Ans. a) Northwest
d) In American continent, a cyclone is known as ___?
a) Typhoon b) Hurricane
Ans. b) Hurricane
3) Answer the following questions:
a) What is wind? Which device is used to measure the speed of wind?
Ans. The moving air is called wind.
An anemometer is used to measure the speed of wind.
b) Explain why smoke goes up. What causes a change in direction of flow of wind?
Ans. Smoke goes up because the warm air is lighter than the cold air.
A change in direction of the flow of wind is caused by the rotation of the earth.
c) What is thunderstorm? What are the precautions for the thunderstorm?
Ans. The swift movement of the falling water droplets along with the rising air create lightning and sound, this event is called thunderstorm.
The precautions for the thunderstorm are,
i) Do not take shelter under an isolated tree. If you are in a forest take shelter under a small tree. Do not lie on the ground.
ii) Do not sit near a window. Open garages, storage sheds, metal sheds are not safe places to take shelter.
iii) A care or a bus is a safe place to take shelter.
iv) If you are in water, get out and go inside a building.
4) What causes cyclone? What is the speed of the wind in a cyclone? What are the precautions for the cyclone if you are staying in a cyclone hit area?
Ans. High-speed winds and air pressure difference causes cyclone.
The speed of the wind in a cyclone is about 150-250 km/h.
The precautions for the cyclone are,
i) Do not drink water that could be contaminated. Always store drinking water for emergencies.
ii) Do not touch wet switches and fallen power lines.
iii) Do not go out just for the sake of fun.
iv) Do not pressurize the rescue force by making undue demands.
v) Cooperate and help your neighbors and friends.
5) In our country tornadoes are not very frequent. A tornado is a dark funnel shaped cloud that reaches from the sky to the ground. Most of the tornadoes are weak. A violent of tornado can travel at speeds of about 300 km/h. Tornadoes may form within cyclones.
a) A tornado is a dark ____ shaped cloud. (funnel)
b) A violent of tornado can travel at speeds of about ____ km/h. (300)
6) Mark your answer as per the codes provide below:
a) A: The rising water may be as high as high as 3-12 meters.
R: Rising water caused by a cyclone.
I.) Both A and R are true and R is the correct explanation of A.
II.) Both A and R are true but R is not the correct explanation of A.
III.) A is true but R is false.
IV.) A is false but R is true.
V.) Both A and R are false.
Ans I. Both A and R are true and R is the correct explanation of A.
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