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Olympiad Test: Winds, Storms And Cyclones


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20 Questions MCQ Test Science Olympiad Class 7 | Olympiad Test: Winds, Storms And Cyclones

Olympiad Test: Winds, Storms And Cyclones for Class 7 2022 is part of Science Olympiad Class 7 preparation. The Olympiad Test: Winds, Storms And Cyclones questions and answers have been prepared according to the Class 7 exam syllabus.The Olympiad Test: Winds, Storms And Cyclones MCQs are made for Class 7 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Winds, Storms And Cyclones below.
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Olympiad Test: Winds, Storms And Cyclones - Question 1

Which of the following will rises the highest?

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 1

Warmer air rises higher. This is because gases expand when they are heated. 

Olympiad Test: Winds, Storms And Cyclones - Question 2

An anemometer is an instrument that is most similar to a

Olympiad Test: Winds, Storms And Cyclones - Question 3

Cold winds usually show ______ movements, while warm winds usually show ______ movements.

Olympiad Test: Winds, Storms And Cyclones - Question 4

When a vehicle moves very fast, a/an ______ is created temporarily behind it.

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 4

When a wind flows very fast, a low pressure is produced temporarily which is filled by the rushing wind nearby. 

Olympiad Test: Winds, Storms And Cyclones - Question 5

Which of the following statements is incorrect?

Olympiad Test: Winds, Storms And Cyclones - Question 6

On heating, gases become ______ because the molecules ______.

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 6

Upon heating, the molecules in the gases go further away from each other and thus become lighter. 

Olympiad Test: Winds, Storms And Cyclones - Question 7

The monsoon winds that carry a lot of water to India come from the

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 7

The winds coming from the southwest blow over the Indian ocean and bring lots of rains. 

Olympiad Test: Winds, Storms And Cyclones - Question 8

During the formation of rain, when water vapour changes back to liquid in the form of rain drops:​

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 8

The energy contained in the gaseous form (vapour) is more than the energy contained in the liquid form (water), therefore when vapour changes to water it loses some heat.

Olympiad Test: Winds, Storms And Cyclones - Question 9

Which of the following is the best thing to do during heavy lightning?

Olympiad Test: Winds, Storms And Cyclones - Question 10

How do cyclones decrease the fertility of the soil in the coastal areas?

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 10

Salinity is harmful to the plants. During cyclones, the sea waves rise high and flood the land making the soil saline (infertile). 

Olympiad Test: Winds, Storms And Cyclones - Question 11

Which of the following is the first sign of an approaching cyclone?

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 11

Even when the cyclone is very far, strong winds push water towards the shore causing huge water waves. 

Olympiad Test: Winds, Storms And Cyclones - Question 12

The winds on the earth do not flow in the exact “north to south” or “south to north” directions because

Olympiad Test: Winds, Storms And Cyclones - Question 13

Sea and land breezes are caused because of

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 13

Sea and land breezes are caused because of an uneven heating of the earth and through convection currents. 

Olympiad Test: Winds, Storms And Cyclones - Question 14

Which of the following doesn’t show that air has pressure?

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 14

A ball falls down to the ground because of gravity. 

Olympiad Test: Winds, Storms And Cyclones - Question 15

During the take-off of an aeroplane there is a ______ pressure on the top and a ______ pressure below.

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 15

Because of the curved upper surface of the aeroplane more air flows in the same time as compared to the lower surface. Therefore, the pressure over the aeroplane  is less when compared to the lower surface. 

Olympiad Test: Winds, Storms And Cyclones - Question 16

Which condition is necessary for the development of cyclonic storm?

Olympiad Test: Winds, Storms And Cyclones - Question 17

Which country is most likely to be affected by cyclones?

Olympiad Test: Winds, Storms And Cyclones - Question 18

While drinking a soft drink with the help of a straw, the pressure in the straw is ______ and the pressure in the bottle is ______.

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 18

When we suck into the straw, a low pressure is created in it, which makes the higher pressure in the bottle to push the drink into the straw. 

Olympiad Test: Winds, Storms And Cyclones - Question 19

Which of the following is most likely to be in the ‘eye’ of a cyclone?

Olympiad Test: Winds, Storms And Cyclones - Question 20

What is the best thing to do when strong winds are blowing over a hut having a weak thatched roof?

Detailed Solution for Olympiad Test: Winds, Storms And Cyclones - Question 20

When winds blow over a weak roof, it creates a low pressure over it and a high pressure inside causing the roof to be blown off.
Opening the doors and windows reduces this pressure difference and avoids the roof from being blown off. 

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