Page 104 - EVS Class 04

the air is dry, so clothes dry quickly. The evaporation becomes faster on

sunny days.

g Water evaporates faster when the surface is large.

Water evaporates faster when it is spread on a
large area. Therefore, we spread our clothes to dry
them. If we do not spread them properly, they will

take a longer time to dry.

g Water evaporates faster when it is windy.

Pour water into two small containers. Keep one
under the moving fan and the other in a room with
no wind. We will see that water evaporates faster under the fan.

The water evaporates faster because wind helps in fast evaporation. So, your
mother keeps wet clothes under the fan during rainy days.

g Water evaporates faster in high temperature.

High temperature makes the air hot and helps in faster evaporation of water.

* All living things need water to survive.
* The different sources of water are– rain, lakes, ponds, rivers, seas and
oceans.

* Water is stored in dams, canals and reservoirs.
* Evaporation and condensation are the two processes by which water
changes its form.

* Water evaporates when it is left in the open.
* Water evaporates faster in high temperature.

A. Answer the following questions.

1. What are the different sources of water?

2. How do we get underground water?

3. What is an ocean?
4. What is evaporation?

5. What is condensation?

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