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Questions and Answers
What is transpiration?
What is transpiration?
The loss of water (in the form of vapour) from the leaves of plants into the air.
How does temperature affect transpiration?
How does temperature affect transpiration?
The rate of transpiration is faster at higher temperatures.
Explain the impact of humidity on transpiration.
Explain the impact of humidity on transpiration.
On a humid day, transpiration is lower because the air already contains a lot of moisture.
What effect does wind have on transpiration?
What effect does wind have on transpiration?
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How does light influence transpiration?
How does light influence transpiration?
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What is the role of transpiration in helping trees/plants?
What is the role of transpiration in helping trees/plants?
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When do stomata in leaves open and close?
When do stomata in leaves open and close?
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Study Notes
Transpiration
- Transpiration is the loss of water from leaves of plants into the air in the form of vapour.
- It occurs through stomata in leaves via diffusion.
Factors Affecting Transpiration
- Time of Day: Stomata are open during the day, allowing for more transpiration, and closed at night, reducing transpiration.
- Temperature: Higher temperatures increase the rate of transpiration, making more transpiration occur on hot days than cold days.
- Humidity: High humidity slows down transpiration as the air already contains a lot of moisture.
- Wind: Wind increases the rate of transpiration by removing water vapour from around the leaves.
- Light: Light increases transpiration by causing stomata to open.
Importance of Transpiration
- Cooling Effect: Transpiration produces a cooling effect, protecting delicate cells from the heat of sunlight.
- Water Movement: Transpiration helps move water from roots upwards in plants.
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Description
Learn about the process of transpiration in plants, which involves the loss of water from leaves into the air through stomata. Explore the factors affecting transpiration, such as time of the day and temperature.
