CBSE Class 7 Science Winds Storms and Cyclones Worksheet Set A

Question. The term 'monsoon' refers to
a) Rains, anytime, anywhere in the world.
b) Post-summer rains anywhere in the world.
c) Rains, anytime, in and near India.
d) Post-summer rains in and near India.

Answer : D

Question. Parts of the Beaufort Wind Scale, which is a numerical scale for wind speed, are given. Answer the question using this information.
Where would you put the following symbol?

a) Wind speed 13-19 km/h
b) Wind speed 31-39 km/h
c) Wind speed 51-61 km/h
d) Wind speed 75-87 km/h

Answer : B

Question. Parts of the Beaufort Wind Scale, which is a numerical scale for wind speed, are given. Answer the question using this information.
The effect on land: “large branches move” is likely to match the description---------------------

a) Light air
b) Gentle breeze
c) Strong breeze
d) Strong gale

Answer : C

Question. Parts of the Beaufort Wind Scale, which is a numerical scale for wind speed, are given. Answer the question using this information.
Heavy rains and strong winds lashed the coast of Tamil Nadu yesterday causing widespread damage in their wake. Winds reaching a speed of up to 100 kmph were reported. Trees were uprooted at a number of places inhibiting traffic movement."Which weather map symbol corresponds to the above description?"

Answer : C

Question. You must have played with gas balloons that keep rising higher and higher in the air. Why do these gas balloons rise
a) The balloon is made of a special material whose density is less than air's.
b) The balloon is filled with a gas less dense than air.
c) The balloon is filled with a gas colder than air.
d) The thread of the balloon is made of a special material.

Answer : B

Question. Renu has to fill a number of small bottles with juice quickly and with no spillage. Which of these arrangements should she use?

Answer : A

Question. Tinu had two identical balloons. In one of them he filled helium gas and in the other he filled air. He found that when he let the balloons free, the balloon filled with helium gas flew away in the air, while the balloon filled with air fell to the ground. On the basis of this, Tinu suggested the following explanations. Which of them is MOST likely to be true?
a) Gas from the helium-filled balloon was leaking.
b) Helium gas is lighter than air.
c) Earth repels the helium-filled balloon.
d) The amount of helium filled was less than the air.

Answer : B

Question. Paddy is grown in the Kharif season (July-October) in India. It is sown with the onset of the south-west monsoon in India which coincides with the months of June and July, and is harvested in October. From this, we can conclude that Paddy is a/an___________.
a) annual crop
b) biennial crop
c) perennial crop
d) (the information is insufficient)

Answer : A

Question. Typically, how are sedimentary rocks formed?
a) due to the eruption of volcanoes
b) under great pressure and high temperatures
c) below the earth's surface as the magma cools
d) from materials that settle over centuries

Answer : D

Question. India possesses one-fortieth of the world's land area, but has 197 million cattle which is more than in any other nation. This has led to serious problems of overgrazing as animals have encroached into forest lands and even agricultural lands. Which of these would be a likely consequence of this overgrazing?
a) Acid rain
b) Soil erosion
c) Air pollution
d) Global warming

Answer : B

Question. Ram had read that plants needed fertilizers from the soil for healthy growth. 
He placed a plant in the Sun, as shown in the figure.
In order to check whether what he had heard was correct, Ram needed another plant. Which of the following should he use?

Answer : C

Question. The question is about a fertilizer company that has made a new fertilizer A. It says that if this new fertilizer is mixed with another fertilizer B, plants will grow better than when B alone is used. Kamesh, who normally uses fertilizer B, wants to verify if this is true. Kamesh divides his tomato plants into 4 groups and grows them using different fertilizers.
Which group(s) are not actually relevant to verify what Kamesh wanted to?

a) Groups 1 and 4
b) Groups 2 and 4
c) Groups 1 and 3
d) Group 4 only

Answer : A

Question. The question is about a fertilizer company that has made a new fertilizer A. It says that if this new fertilizer is mixed with another fertilizer B, plants will grow better than when B alone is used. Kamesh, who normally uses fertilizer B, wants to verify if this is true. Kamesh divides his tomato plants into 4 groups and grows them using different fertilizers.
If what the company says about fertilizer B is true, what will be order FROM BEST TO WORST of the growth of the plants in groups 2 to 4?

a) Group 4, group 3, group 2
b) Group 3, group 2, group 4
c) Group 3, group 4, group 2
d) Group 2, group 3, group 4

Answer : B

Question. Ahmed's grandfather plants trees all along the edge of their farm in the hills, along the boundary fence. What is MOST likely to be the reason for this?
a) to reduce the rainfall
b) to keep away goats
c) To conserve soil
d) to demarcate the boundary

Answer : C

Question. Raghu's swimming instructor asked him to hold his breath while pushing his face underwater. What will happen to the level of oxygen concentration in Raghu’s blood while holding his breath?
a) The oxygen concentration will decrease.
b) The oxygen concentration will increase.
c) The oxygen concentration will remain the same.
d) The oxygen concentration will become zero.

Answer : A

            Questions

            Very Short Answer

Q1)      Why it is difficult to force the paper ball into the bottle?

Q2)      What is the eye of the storm?

Q3)      What is wind?

Q4)      What is anemometer?

Q5)      Why do we find it difficult to ride a bicycle against the direction of the wind?

            Short Answer

Q6)      Why air expands on heating?

Q7)      What are the effective safety measures we have to take during cyclone?

Q8)      How thunderstorms become cyclone?

Q9)      What do you mean by the tornadoes?

Q10)    What kind of destruction caused by the cyclones?

            Long Answer

Q11)    What kind of precautions we have to take when a storm accompanied by the lightning?

Q12)    Explain the situation how the wind currents are generated due to the uneven heating on the earth?

Q13)    What precautions we have to take when we are staying in a cyclone hit area?

Q14)    State the difference between cyclone and hurricane?

Q15)    Distinguish between hurricane and tornadoes?

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