Evaporation

Question 1

Why does a puddle dry up after the rain stops?

Answer 1

Because the heat makes water in the puddle evaporate.

Question 2

What happens to the water?

Answer 2

The water evaporates.

Question 3

Why evaporation happens?

Answer 3

Because some particles in the liquid gain heat energy. The heated particles start to move faster and move further apart. Eventually heated particles move so far apart. They escape from the surface and become a gas.

Question 4

Cement in the cement mixer is a liquid. The cement between bricks in a wall is a solid. What has happened to the liquid in the cement?

Answer 4

It evaporates so that the cement dried out.

Question 5

Why do puddles dry up quicker on hot days?

Answer 5

The heat makes the water in the puddles evaporate faster than on cool days because that the particles in the puddle gain heat energy which makes them move faster and further apart and change into water vapour more quickly.

Question 6

What is evaporation?

Answer 6

Evaporation is the process of by which a liquid turns into a gas.

Question 7

Why evaporation is useful?

Answer 7

Evaporation is useful for us because we can dry clothes under the sun,dry of wet floor, dry your hair and others.

Question 8

Why do we feel cool if we lick and blow on our hand?

Answer 8

Because any water on your hand uses heat energy from your body to evaporate.

Question 9

Why do you think soil in the garden dries out more quick on hot, windy days?

Answer 9

The heat from the Sun and wind make water in the soil evaporate more quickly.

Question 10

Why is it better to stay fully clothed in a hot desert, even if you feel very hot?

Answer 10

It is better to stay fully clothed because this will slow down evaporation from the body.

Question 11

When evaporation is not useful for us?

Answer 11

Evaporation is not useful for use because when pond, dams dry out it can be cause for animals and creatures.

Question 12

What will you measure or test?

Answer 12

Volume of liquid.

Question 13

What will you keep the same? How will you do this?

Answer 13

The volume of each liquid, the place the liquids are put, the length of time each liquid is left.

Question 14

How will you make test fair?

Answer 14

Use same amount of liquids and put them in the same place for the same length time.

Question 15

Why does plate lose water than other containers?

Answer 15

Because it has large surface area.

Question 16

What are two ways in which a hair dryer makes water evaporates from our hair?

Answer 16

• It heats up the water in your hair which means that the water evaporates more quickly.
• It blows away the water vapour and speeds up evaporation in the same way the wind does.

Question 17

How can they make sure enough evaporation takes place?

Answer 17

They can put on the tray or rack and leave it in the Sun, or in an oven at a low temperature.

Question 18

Why do shallow reservoir lose more water by evaporation than deep reservoirs?

Answer 18

There is less water in the reservoir behind shallow dams than in the reservoir behind deep dams, so the water particles heat up faster, causing more water to evaporate than from deep reservoirs.