7 Questions
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?
The rate of transpiration is faster at higher temperatures.
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?
Wind increases the rate of transpiration.
How does light influence transpiration?
Light causes the stomata to open, increasing the rate of transpiration.
What is the role of transpiration in helping trees/plants?
Transpiration produces a cooling effect, saving delicate cells from the heat of the sunlight.
When do stomata in leaves open and close?
Stomata are open during the day and close at night.
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.
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.
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