Water in nature
Is made up of all the water in the oceans, seas, rivers, lakes, polar ice caps and glaciers as well as groundwater
Hydrosphere
Some of the water falls to Earth in the form of snow, rain or hail
Precipitation
Rivers and rain carry rocks and minerals to oceans and seas
What makes the water in oceans and seas saline?
They are permanent bodies of water
Lakes
It is the aount of water a river carries
Flow rate
It can be solid, liquid or gas
the three forms of water
Heat causes the water in the sea to...
evaporate
Bodies of water moving on circular patterns
Ocean currents
Whe it rains, some of the water penetrates the ground and collects in...
Aquifers
The space the water in the river occupies as it flows along its course
River Channel (Cauce)
97,25%
How much of the water in the hydrosphere is salt water?
Water vapour cools, forming clouds
Condensation
Rising and falling movements of water because of the pressure of wind on its surface
What causes waves?
Most of the fresh water on Earth is...
Frozen solid
The area drained by a river and all its tributaries and underground springs
River basin (cuenca del río)
Subterranean water, lakes and rivers, icebergs and glaciers
Fresh water
Some of the water is absorbed into the ground.
Infiltration
Periodic changes in the level of water caused by the gravitational pull of the Sun and the Moon
What are tides?
Some people dig them to get water deep under the ground
Wells
The flow rate increases as it recieves water from tributaries. The river transports the materials eroded in the upper course, depositing the bigger ones
Middle course
0.4%
Lakes and rivers
Almost all fresh water exists as ice in...
glaciers and at the poles
It happens when the sea level rises...
High tide
Almost 30% of fresh water
Groundwater
Land is quiet flat and the speed of water decreases, making river deposit sediments (smaller materials). The channel is wide and meanders appear.
Lower course