Water on Earth

97% salt water

3% fresh water

70% is frozen

29% found underground

1% found in streams/lakes/rivers

Also known as water cycle

1. Evaporation / Transpiration

2. Condensation

3. Rainfall

4. Runoff / Groundwater

River source

The place at which a river begins

Tributaries

the streams and rivers that join a main river

River mouth

The end of the river wehn it flows into a lake or sea

Drainage Basin

he boundary of a drainage basin is marked by the tops of the surrounding highland

Watershed

the area that is drained by a river and its tributaries is called the drainage basin

Valleys

A low area between hills or mountains

Waterfalls

A vertical flow of fast-moving water falling from a great height

Meanders

A bend or curve in a river

Floodplains

A low-laying land that becomes flooded when a river overflows its banks

Deltas

Formed where layers of sediment are deposited at the river mouth over time

Positive

Water supply for farming

Fertile soil for farming

Water supply for industry

Recreation and tourism

Source of drinking water and food

Production of hydroelectric power

Means of transport

Negative

Flooding