The effects of environmental factors on the rate of water uptake by a plant
I can explain the effects of environmental factors on the rate of water uptake by a leafy shoot.
The effects of environmental factors on the rate of water uptake by a plant
I can explain the effects of environmental factors on the rate of water uptake by a leafy shoot.
Lesson details
Key learning points
- Compare data on rate of water uptake by a plant at a range of light intensities.
- Identify a pattern or trend in the data.
- Higher light intensity increases transpiration rate as stomata open wider to increase gas exchange for photosynthesis.
- Increased temperature and air movement also increase the rate of water uptake.
- Higher temperature and air movement increase transpiration due to increased diffusion of water out through stomata.
Common misconception
Some students may struggle to explain how transpiration is affected by a number of factors, even though these factors have the same effects on everyday activities such as drying hair or clothes.
Links between these everyday events and transpiration have been made and illustrated simultaneously, so students make the link between the two.
Keywords
Photosynthesis - a series of chemical reactions in the cells of producers, which use carbon dioxide and water to make glucose and oxygen, requiring light
Light intensity - the amount of light reaching a given area in a given time
Stomata - pores in the leaf through which water, oxygen and carbon dioxide can diffuse
Transpiration - the loss of water from a plant’s leaves
Trend - a pattern in data
Equipment
None required.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
Loading...