Water cycle

Question 1

What percentage of all living organisms is made up of by water

Answer 1

65-95 %

Question 2

What do plants use water for

Answer 2

photosynthesis, respiration and transpiration

Question 3

what is photosynthesis

Answer 3

combining co2 sunlight an water to make glucoses and starch

Question 4

What is respiration

Answer 4

converting glucose to energy releasing c02

Question 5

what percentage of water is stored in oceans

Answer 5

97%

Question 6

What is the water balance

Answer 6

Summarises the flows of water in a drainage basin

Question 7

What are the principle 8 flows of water

Answer 7

Precipitation, evaporation, transpiration, run-off(overland flow), infiltration, percolation and throughflow, stem flow

Question 8

What is throughflow

Answer 8

Movement of water horizontally beneath the surface usually when soil is completely saturated

Question 9

What is the difference between percolation and infiltration

Answer 9

Infiltration is the downward movement of water whilst Percolation id the movement of water through soil and porous rock

Question 10

What is stem flow

Answer 10

Water runs down the trees stem or bole to the ground surface

Question 11

Factors that effect interception loss

Answer 11

Interception storage capacity - as saturation of vegetation increases then more stem flow increases so less water is retained on leaves
Wind speed - Rates of evaporation increases with wind speed so less water is absorbed
Vegetation type - interception losses are greater from agricultural crops and grasses then trees due to surface area
Interception losses are greater from evergreens then from deciduos trees as they have needle leaves so water adheres to them more so the water is more likely to evaporate