Winds, Storms and Cyclones Test

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Winds, Storms and Cyclones Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

It is difficult to ride a bicycle against the direction of flow of wind because the

A
air exerts pressure

B
bicycle becomes lighter

C
bicycle moves faster

D
wind causes reduced pressure

Solution

It is difficult to ride a bicycle against the direction of flow of wind because force is exerted by the air pressure on the bicycle and the rider. This opposes the motion.
Question 2
1 / -0

To reduce the air pressure falling on banners and hoardings

A
holes are made in them

B
they are made of cotton clothes

C
they are tied strongly

D
are hanged high

Solution

As air exerts pressure, wind blowing at a high speed may break or displace things. If holes are made in hanging banners and hoardings, then air can pass through these holes. This will reduce the pressure exerted by air on banners and hoardings and these will not fall easily.
Question 3
1 / -0

Two identical glass beakers A and B are placed on a tabletop. Beaker A is filled with distilled water and beaker B is filled with salty water. Choose the correct statement from among the following.

A
Pressure at the bottom of A is more than the pressure at the bottom of B.

B
Pressure at the bottom of B is more than the pressure at the bottom of A.

C
Pressure at the bottom of A is equal to the pressure at the bottom of B.

D
There is no relation between the two.

Solution

As the density of the salty water is more than the density of the distilled water and the pressure is directly proportional to the density i.e. greater is the density, greater is the pressure. Hence 'Pressure at the bottom of B is more than the pressure at the bottom of A' is the correct answer.
Question 4
1 / -0

Read the following statements and choose the correct option:

Statement A: If you fill a bottle partially with very hot water, and then stretch a balloon over the top, the balloon will inflate slightly over the next few minutes.
Statement B: The heat in the water causes the balloon to inflate.

A
Both statements A and B are correct and B is the correct explanation of A.

B
Both statements A and B are correct, but B is not the correct explanation of A.

C
Statement A is incorrect, but statement B is correct.

D
Both statements A and B are incorrect.

Solution

Both statements A and B are correct and B is the correct explanation of A because the heat of the hot water will expand the air above it so balloon will inflate.
Question 5
1 / -0

Read the following statements and choose the correct option:

Statement A: When a suction cup is pressed against a smooth wall, the air inside is pushed out of the cup.
Statement B: Atmospheric pressure holds the cup against the wall as force is exerted on the cup due to the atmospheric pressure.

A
Both statements A and B are correct and B is the correct explanation of A.

B
Both statements A and B are correct, but B is not the correct explanation of A.

C
Statement A is incorrect, but statement B is correct.

D
Both statements A and B are incorrect.

Solution

Both statements A and B are correct and B is the correct explanation of A as the suction cup has a reduced air pressure from within. The pressure outside is more than the inside pressure hence, there will be an inward force due to this pressure difference.
Question 6
1 / -0

Two balloons are hanging by threads. Air is blown within the balloons with the help of a straw. Then, the

A
balloons will come closer to each other

B
balloons will move apart

C
balloons will remain still

D
balloons will move to one side

Solution

As the air is blown within the two balloons, so the pressure will reduce and the pressure difference is created on both sides of the balloon and due to this, both balloons will come closer to each other.
Question 7
1 / -0

The main cause of wind movement is the

A
uneven heating of earth

B
difference in latitudes

C
difference in altitudes

D
even heating of earth

Solution

Due to the uneven heating of the atmospheric air, pressure zones are created because air being heated up moves in upward direction and the relatively cooler air rushes to fill the vacant space which causes wind to blow.
Question 8
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A piece of plywood is kept on a table. You have to lift it from the table by blowing air around at very high speed from a powerful fan. In which direction will you blow the air?

A
In the upward direction

B
In the downward direction

C
Sideways

D
In the upward direction below the table

Solution

Air will be blown from the sideways as it creates a low pressure zone and due to the pressure difference, there will be a net force on board and due to which, it will be lifted up.
Question 9
1 / -0

Read the following statements and choose the correct option:

Statement 1: One should build a house with windows and ventilators.
Statement 2: Warm air is lighter than cool air, which rises up and exits through the ventilators. Cool air is heavier and thus, moves in through the windows, making the room comfortable for living.

A
Both Statement 1 and Statement 2 are true and Statement 2 is the correct explanation of Statement 1.

B
Both Statement 1 and Statement 2 are true but Statement 2 is not the correct explanation of Statement 1.

C
Statement 1 is true, but Statement 2 is false.

D
Statement 1 is false, but Statement 2 is true.

Solution

Both Statement 1 and Statement 2 are true and Statement 2 is the correct explanation of Statement 1.

As warm air is lighter than cool air, warm air rises up and exits through the ventilators. Cool air is heavier and thus, moves in through the windows, making the room comfortable for living.
Question 10
1 / -0

Choose the correct statement(s) from among the following:

If Earth starts spinning in the opposite direction, then

A. the tropical cyclone winds will rotate anticlockwise in the northern hemisphere and clockwise in the southern hemisphere
B. the sun will rise in the west and set in the east
C. trade winds will flow from north west

A
Only A

B
Only A and B

C
Only B and C

D
All A, B and C

Solution

In the northern hemisphere, trade winds blow from North-East and in the southern hemisphere, trade winds blow from South-East, this is due to the rotation of Earth. If Earth starts spinning in the opposite direction, direction of the trade winds will become opposite and rising of the sun and setting of the sun will also change.

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Re-Attempt Weekly Quiz Competition

Winds, Storms and Cyclones Test - 1

Result

Winds, Storms and Cyclones Test - 1

Score

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Rank

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SHARING IS CARING

Question 1

air exerts pressure

bicycle becomes lighter

bicycle moves faster

wind causes reduced pressure

Solution

Question 2

holes are made in them

they are made of cotton clothes

they are tied strongly

are hanged high

Solution

Question 3

Pressure at the bottom of A is more than the pressure at the bottom of B.

Pressure at the bottom of B is more than the pressure at the bottom of A.

Pressure at the bottom of A is equal to the pressure at the bottom of B.

There is no relation between the two.

Solution

Question 4

Both statements A and B are correct and B is the correct explanation of A.

Both statements A and B are correct, but B is not the correct explanation of A.

Statement A is incorrect, but statement B is correct.

Both statements A and B are incorrect.

Solution

Question 5

Both statements A and B are correct and B is the correct explanation of A.

Both statements A and B are correct, but B is not the correct explanation of A.

Statement A is incorrect, but statement B is correct.

Both statements A and B are incorrect.

Solution

Question 6

balloons will come closer to each other

balloons will move apart

balloons will remain still

balloons will move to one side

Solution

Question 7

uneven heating of earth

difference in latitudes

difference in altitudes

even heating of earth

Solution

Question 8

In the upward direction

In the downward direction

Sideways

In the upward direction below the table

Solution

Question 9

Both Statement 1 and Statement 2 are true and Statement 2 is the correct explanation of Statement 1.

Both Statement 1 and Statement 2 are true but Statement 2 is not the correct explanation of Statement 1.

Statement 1 is true, but Statement 2 is false.

Statement 1 is false, but Statement 2 is true.

Solution

Question 10

Only A

Only A and B

Only B and C

All A, B and C

Solution

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