NNN
Name……………….. Class – 7th
Topic: Winds, storms &cyclones
Choose the correct option :
1.
Moving air is called a.
Cyclone
Subject :Physics
Date:……… b.
Wind c.
Tornado d.
Hurricane
2.
High speed winds are accompanied by reduced air pressure.This principle is used in describing a.
Lifting and blowing off roofs in high winds. b.
Airplanes getting the pressure lift c.
Flying of helicopters d.
All of the above
3.
Air exerts a.
Friction b.
Increase in volume c.
Force d.
Pressure
4.
A chapatti swells up on heating because a.
Air expands on heating b.
Air contracts on heating c.
Vacuum is created inside the chapatti d.
None of the above
5.
The diameter of a cyclone varies from

a.
80 to 320 km b.
90 to 720 km c.
100 to 320 km d.
80 to 420 km
6.
Development and movement of cyclones is monitored by a.
Artificial satellites b.
Radar c.
Television d.
All of the above
7.
Cyclones can be caused by a.
High speed winds b.
Air pressure difference c.
Both a and b d.
Neither a or b

Name……………….. Class -7th
Topic: Winds ,storms and cyclones
Answer the following :
1.
Why are people advised not to stand near fast moving train?
Subject :Physics
Date:………
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2.
In winter regions near, why does wind blow from land to sea?
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3.
Why does the smoke goes up?
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4.
In which area high air pressure is likely to develop?
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5.
Why cool air exerts more pressure?
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6.
Why the can gets distorted when hot water is poured into it?
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NNN
Name……………….. Class – 7
Topic: Winds, Storms and Cyclones th
Subject :Physics
Date:………
Cyclone Hit at Samoa Islands credits: NOAA
Q1: Fill the missing word in the blank spaces in the following statements:
(a) Wind is _________ air.
(b) Winds are generated due to ________ heating of the earth.
(c) Near the earth’s surface __________air rises up whereas ___________ air comes down.
(d) Air moves from a region of _________ pressure to a region of ___________ pressure.
(e) Air around us exerts __________ in all directions.
(f) Air _________ on heating while ________ on cooling.
(g) Two advanced technology used to monitor cyclones are______ and __________ .
(h) The word monsoon is derived from the Arabic word _________, which means ‘season’.
(i) The instrument used for wind direction is _________ .
Q2: What happens to the pressure of the wind if its speed is increased?
Q3: Name the instrument used to measure the speed of wind.
Q4: Suggest two methods to find out wind direction at a given place.
Q5: State two experiences that made you think that air exerts pressure
(other than those given in the text).
Q6: You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer.
Q7: Explain why holes are made in hanging banners and hoardings.
Q8: Describe an experiment to show pressure reduces when air moves with high speed.

NNN
Name……………….. Class – 7
Topic: Winds, Storms and Cyclones th
Q1: Why are thatched roofs of huts blown off during high winds?
Subject :Physics
Date:………
Q2: Name the scientist who discovered first time that when air moves with speed, its pressure drops.
Q3: How will you help your neighbours in case cyclone approaches your village/town?
Q4: What planning is required in advance to deal with the situation created by a cyclone?
Q5: Which one of the following place is unlikely to be affected by a cyclone.
(i) Chennai
(ii) Mangaluru (Mangalore)
(iii) Amritsar
(iv) Puri
Q6: Which of the statements given below is correct?
(i) In winter the winds flow from the land to the ocean.
(ii) In summer the winds flow from the land towards the ocean.
(iii) A cyclone is formed by a very high-pressure system with very high-speed winds revolving around it.
(iv) The coastline of India is not vulnerable to cyclones.
Q7: Give differences between a cyclone and a tornado .
A Tornado

Name………………..
Topic: Winds , storms and cyclones
Class – 7th
1.
Why light air exerts less pressure? a.
b.
Because particles move far away
It expands c.
d.
Volume of gas increases
All of these b.
c.
d.
2.
Why does a paper strip flies when air blow over it? a.
Because upward air pressure decreases
Because downward air pressure increases
Upward air pressure decreases than downward air pressure
Both (A) & (B)
3.
Which of these is an indicative of stormy weather at a place a.
high air pressure b.
c.
d.
all of these
4.
Find the odd one out a.
b.
low air pressure
high temperature
Listen weather forecast
To keep extra stock in case of storm warning c.
d.
Torches & batteries should be kept at home
Should keep the house open in such a condition
5.
Which of the following is most devastating? a.
Cyclones
Subject :Physics
Date:………

a.
b.
c.
d.
b.
Twisters c.
Thunderstorms d.
Waterspouts
6.
Which of the following safety measures should be followed during thunderstorms?
People should move to a safe place.
To remain indoors with all windows & doors closed
To squat in an open place away from trees
Both (B) & (C) b.
c.
d.
7.
Which winds bring rainfall to south Asia? a.
Summer monsoon winds
Winter monsoon winds
Trade winds
Both (A) & (B) b.
c.
d.
8.
Which of these is not a name of a Tornado a.
Twister
Whirlwinds
Water spore
Waterspout b.
c.
d.
9.
Which of these is a function of weather satellites? a.
Pictures of clouds
Measure temperature
Wind speed
All of these

Name………………..
Topic: Winds , storms and cyclones
Class – 7th Subject :Physics
Date:………
1.
How storm is different from breeze?
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2.
Why the leaves of the trees, banners or flags flutter when the wind blows?
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3.
What happens when air gets heated?
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4.
What are the main reasons for the movement of air?
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5.
When is a storm expected?
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