Flashcards in 1.2 The Water Cycle Deck (17)
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1
How much of the earths water is oceanic?
97%
2
How much of the earths water is freshwater?
3%
3
How much of the earths freshwater is in ice caps and glaciers?
79%
4
How much of the earths freshwater is groundwater?
20%
5
How much of the earths freshwater is easily accessible surface water?
1%
6
How much of the earths easily accessible fresh water is water within living organisms?
1%
7
How much of the earths easily accessible fresh water is in lakes?
52%
8
How much of the earths easily accessible fresh water is in rivers?
1%
9
How much of the earths easily accessible fresh water is atmospheric water vapour?
8%
10
How much of the earths easily accessible fresh water is soil moisture?
38%
11
What are the two ways in which condensation can happen?
When the temperature of air is reduced to dew point but its volume remains constant
When the volume of the air increases but there is no addition of heat - happens when air rises and expands in the lower pressure of the upper atmosphere
12
What is a drainage basin?
Area of land drained by a river and its tributaries. Includes water found on the surface, in the soil and in near-surface geology
13
What are the inputs in a drainage basin?
Ocean precipitation
Land precipitation
14
What are the outputs of a drainage basin?
Evaporation from the water surface
Evapotranspiration from plants
15
What are the flows in a drainage basin?
Percolation
Infiltration
Groundwater flow
Throughflow
Throughfall stemflow
Channel fall
16
What is stemflow?
The amount of precipitation intercepted by the canopy that flows down the stems, stalks or trunks to reach the ground
17
