GROUNDWATER

Groundwater is fresh water found beneath the surface of the Earth. 

When it rains, water goes through the soil and collects in empty spaces between rocks and sand.

Here it forms large deposits called aquifers. 

People build wells to collect this water.

Well. Photo by Roger May

FRESH WATER

On the surface of the continents, there is water in rivers, streams and lakes. 

This is called fresh water because it contains very little salt.

People, animals and plants drink fresh water. 

This is called drinking water. 

Drinking water must be clean.

Stream. Photo by Mann jess

SEA WATER

Most water on Earth is in the seas and the oceans.

Water from the seas is called salt water because it contains a lot of salt.

In order to use salt water, the salt must be eliminated at desalination plants. 

This process is expensive and uses a lot of energy.

Desalination Plant. By roplant.org

USES OF WATER

All living things need water to live.
People need to drink water.
We also have many other uses for water, for example in factories and on farms.
Plants take in water through their roots.
Animals need to drink water.
 

Water for cleaning. ICStarzz

Water for drinking. Joost Nelissen

Water for cooking. Gourmet

Water for having a shower. Balaji.B

Water for watering plants. Samuel_belknap

Water for washing clothes. KrashbandyKay...

Animals need water to drink. InvincibleTucan

Animals need water to live. Hans

Water for washing hands. Ms Tina

THE CHANGING STATES OF WATER

 A change of state occurs when water cools or heats up.

• Melting occurs when ice is heated and it turns into water.
• Freezing occurs when water cools and turns into ice. Water freezes at 0 ºC. This is its freezing point.
• Evaporation occurs when water heats up and turns into water vapour.
• Condensation occurs when water vapour cools and turns into liquid water.

Photos: Blender Ice Cubes by ChojinDSL; Isolated Water Crown by MyTudut;  Steam by  westy559

THE THREE STATES OF WATER

Water exists in three different forms, called states:

• Drinking water is water in a liquid state.
• Ice and snow are water in a solid state.
• Water vapour is water in a gaseous state.

WATER: THE DIFFERENT STATES OF WATER

WATER
People, animals and plants need water to live.

THE DIFFERENT STATES OF WATER
Water can exist in three different states: as a liquid, a solid, and a gas.

• Water is a liquid.
• Ice is a solid.
• Water vapour is a gas.

Picture from English is incredible