Cambridge IGCSE Biology
8.3Transpiration
Transpiration in Cambridge IGCSE Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic20 practice questions1 lesson
Learning objectives
What the syllabus expects you to be able to do.
- 8.3.1Describe transpiration as loss of water vapour from leaves by evaporation from mesophyll cell surfaces into air spaces and diffusion out through the stomata.
- 8.3.2Investigate and describe the effects of temperature and wind speed on the rate of transpiration.
- 8.3.3Supplement: relate water vapour loss to the internal surface area of the air spaces and the size and number of stomata, and explain how transpiration pull moves a column of water up the xylem.
- 8.3.4Supplement: explain the effects of temperature, wind speed and humidity on the rate of transpiration, and how and why wilting occurs.
Lessons
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Transpiration
35 min
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