Difference between revisions of "Transpiration"

Latest revision as of 17:29, 20 December 2019

Key Stage 4

Meaning

This diagram shows water being transported from the roots to the leaves of a plant.

Transpiration is the process by which water is transported from the roots of a plant to the leaves.

About Transpiration

In transpiration water evaporates from the leaves and is then replaced by water that is drawn up through the stem from the roots.

Transpiration is needed to bring a constant supply of water and minerals to the leaf for photosynthesis.

Water is lost from the plant through the stomata, so it is important for the plant to be able to close the stomata to control water loss.

If too much water is lost through transpiration the plant may begin to wilt.

The rate of transpiration can be measured using a potometer.

Factors Affecting Transpiration

The rate of transpiration is affected by:

Temperature - High temperatures lead to quicker evaporation of water increasing the rate of transpiration.
Humidity - High humidity makes it harder for water to evaporate slowing the rate of transpiration.
Wind - The constant flow of air causes evaporation to happen more quickly increasing the rate of transpiration.

References

@@ Line 9: / Line 9: @@
 : [[Water]] is lost from the [[plant]] through the [[stomata]], so it is important for the [[plant]] to be able to close the [[stomata]] to control [[water]] loss.
 : If too much [[water]] is lost through [[transpiration]] the [[plant]] may begin to wilt.
+: The rate of [[transpiration]] can be measured using a [[potometer]].
 ===Factors Affecting Transpiration===
 The rate of [[transpiration]] is affected by:
@@ Line 14: / Line 16: @@
 *[[Humidity]] - High [[humidity]] makes it harder for [[water]] to [[evaporate]] slowing the rate of [[transpiration]].
 *[[Wind]] - The constant flow of [[air]] causes [[evaporation]] to happen more quickly increasing the rate of [[transpiration]].
+===References===
+====AQA====
+:[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f561 ''Transpiration, page 70-5, GCSE Biology; Student Book, Collins, AQA '']
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+:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe10370 ''Transpiration, pages 39, 89, GCSE Combined Science; The Revision Guide, CGP, AQA '']
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+:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Transpiration; investigation of, page 73, GCSE Combined Science Trilogy 1, Hodder, AQA '']
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+====Edexcel====
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+====OCR====
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+:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Transpiration; investigating rate, page 34, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
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