Air, Water And Weather Test 3

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Air, Water And Weather Test 3

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Weekly Quiz Competition

Question 1
1 / -0

The figure given shows the relative composition of the air. What X and Y represent respectively?

A
Carbon dioxide, nitrogen

B
Nitrogen, inert gases

C
Nitrogen, Carbon dioxide

D
Oxygen, carbon dioxide
Question 2
1 / -0

Rain water harvesting is

A
Using rain water for irrigation

B
Collecting rain water for later use.

C
Water cycle maintenance

D
Taking bath in rain water and dancing
Question 3
1 / -0

Regarding air, which of the following statement(s) is / are true

(i) Air has no mass
(ii) Air is needed for burning
(iii) Air exerts pressure from all sides and on everything

A
(i) and (ii)

B
(i) and (iii)

C
(ii) and (iii)

D
(i), (ii) and (iii)
Question 4
1 / -0

Which of the following process is component of water cycle?

A
Condensation

B
Evaporation

C
Both a and b

D
None of these
Question 5
1 / -0

Air exerts pressure can be shown by which of the following example?

A
Swimming in ocean

B
Rain falling on ground

C
Flowing of air through tree leaves

D
Sucking up of water using straw
Question 6
1 / -0

Which of the following picture correctly represents the composition of air? Where P = Nitrogen, Q = Oxygen, R = Inert gas, S = Carbon dioxide

A

B

C

D
Question 7
1 / -0

In health care system medicines are injected using syringes or needle. Filling of medicine in syringe is due to

A
Liquid pressure

B
Air pressure

C
Piston pressure

D
Needle pressure
Question 8
1 / -0

When we flipa glass full of water with a cardboard beneath it, the water doesn't spills out because

A
The card board is water proof

B
Air is lighter than card board

C
Attractive force between card board and glass

D
Air pressure pressing the card board from below

Solution

Air pressure is the weight of a column of air pushing down on an area. While we cannot feel it, the air is heavy! The weight of the air pushing down on all objects on Earth is the same as the combined weight of three cars! The reason we don’t feel this extreme weight is that the molecules in air push evenly in all directions – up, down, sideways, diagonally. In this experiment, the air pushing up from underneath the paper is strong enough to overcome the weight of the water pushing down on the paper. Because of the air pressure pushing up on the card, the card will stay on the glass and the water will not spill out.
Question 9
1 / -0

When we put a block of wood in fresh water it floats on it. What will happen if the same block is dropped in water from ocean (Saline) water?

A
Settle down at the bottom

B
Will be at the same level

C
Float at higher level

D
None of these
Question 10
1 / -0

Air and water are found on which planet?

A
Mars

B
Jupiter

C
Earth

D
All of these