2.55: Explain How the Rate of Transpiration is Affected by Changes in Humidity, Wind Speed, Temperature and Light Intensity

TRANSPIRATION: Evaporation of Water from the Surface of the Plant

FACTORS THAT AFFECT RATE OF TRANSPIRATION:

FACTOR	EXPLANATION
TEMPERATURE	Increase in Temperature, Water Particles will have Increase in Kinetic Energy, Causing them to Move Faster and Can Evaporate More Easily Increases the Rate of Evaporation from Spongy Mesophyll and Diffusing Out of the Stomata
HUMIDITY	In a Humid Environment, Water Vapours will Surround the Plant, Creating a Weak Concentration Gradient for the Diffusion of Water Vapours Decreases the Rate of Diffusion of Water Vapours Out of the Stomata
WIND	Blows Away Water Vapours Surrounding the Plant so Maintains a Strong Concentration Gradient Increases the Rate of Diffusion of Water Vapours Out of the Stomata
LIGHT INTENSITY	Increase in Light Intensity, Guard Cells will Absorb More Water by Osmosis and Become Turgid, Allowing the Stomata to Open Increases the Rate of Diffusion of Water Vapours Out of the Stomata (More Water Vapours can Diffuse Out with the Stomata Open Wider)