Transpiration

Question 1

What is transpiration

Answer 1

The loss of water

Question 2

What is the water cohesion theory

Answer 2

As water leaves the plant through the stomata because water is polar this pulls up more water through the xylem as water is cohesive.

Question 3

Factors of transpiration

Answer 3

Light intensity
Temperature
Humidity

Question 4

How does temperature affect transpiration

Answer 4

Increase the rate-
More kinetic energy = more osmosis in and out of plant / more evaporation out of the stomata which is followed by more because of cohesion theory

Question 5

How does light intensity affect transpiration

Answer 5

Increase rate
As high light intensity means the stomata will open for CO2 but also letting water evaporate out

Question 6

How does humidity affect transpiration

Answer 6

More water potential outside of plant slows / stops water diffusing out of the plant through osmsis

Question 7

What happens because water is polar

Answer 7

Cohesive forces with pull other water molecules via hydrogen bonds which helps water travel up the xylem

Question 8

Why do plants open their stomata at day

Answer 8

To allow co2 in for photosynthesis

Plant moves calcium into guard cells which causes a different water potential and water moves via osmosis into the guard cells making them turgid and opening them