Explaining the Effects of Temperature, Wind Speed & Humidity (Cambridge International IGCSE Science)

Explaining the Effects of Temperature, Wind Speed & Humidity: Extended

Extended Tier Only

• Wind speed, humidity and temperature all have an effect on the rate at which transpiration occurs
• The table below explains how these factors affect the rate of transpiration when they are all high; the opposite effect would be observed if they were low

Transpiration Rate Factors Table

Wilting: Extended

Extended Tier Only

• If more water evaporates from the leaves of a plant than is available in the soil to move into the root by osmosis, then wilting will occur
• This is when all the cells of the plant are not full of water, so the strength of the cell walls cannot support the plant and it starts to collapse

A wilted plant cannot support itself and starts to collapse