1.2 The Water Cycle Flashcards Preview

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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

What is through fall?

The amount of precipitation that reaches the ground directly through the gaps in vegetation