Water Basics
What percentage of Earth's surface is covered by water?
71%
Liquid water changing into water vapour.
Evaporation
The beginning of a river.
Source
Not having enough water
Scarcity
Dirtying waterways with waste
Pollution
Most of Earth's water is found where?
The Oceans
Water vapour cooling into clouds.
Condensation
The end of a river
Mouth
Long period with little rainfall
Drought
Farming often requires this resource
Water
What percentage of Earth's water is freshwater?
3%
Water falling from clouds.
Precipitation
Land drained by a river
Catchment
Water safe to drink
Potable water
Removing salt from seawater
Desalination
Water found beneath Earth's surface.
Groundwater
Water soaking into soil.
Infiltration
Smaller river joining a larger one
Tributary
Using less water
Conservation
When groundwater is extracted faster than it is replaced
Overextraction
Frozen freshwater is stored in?
Glaciers
Movement of water across land.
Surface Runoff
Large Australian river system
Murray-Darling
Infrastructure used to store water
Dam
Human activity responsible for most global freshwater use
Agriculture