Test: Air and water- 1

Air is called the breath of life because it contains oxgen and carbon dioxide which is necessary to sustain life.

Uses of Air:

• It is filled up with balloons and swimming tubes.
• it is filled in the tubes inside the tires.
• It helps to dry clothes.
• It helps to move sailboats and windmills.
• It makes the fire burn.
• It is used for flying kites.

Storm : Fast and strong moving wind is called storm.

Air pollution is the type of pollution we can’t See, Smell, Touch or Taste.

When water is kept in a deep freezer, it gets cooled and change into ice at 0°C ice.

Water is used in homes for drinking, cooking food, washing utensils, cleaning floor, brushing teeth, bathing, washing clothes, flushing toilets and watering plants. These are the domestic uses of water. Water is also used by animals for drinking purposes.

Source water refers to sources of water (such as rivers, streams, lakes, reservoirs, springs, and groundwater) that provide water to public drinking water supplies and private wells.

We should not waste water unnecessarily for example we should immediately turn the running tap off when the water is not in use. 

Our main sources of water for drinking, washing, agriculture and industry are surface water, groundwater and collected rainwater, all of which are dependent on rain and snow falling on the Earth's surface.

The main source of water is the rainwater. The water cycle is a process that involves evaporation, condensation and precipitation and the output is rainwater. The water source is important in the water cycle.