Ninety-nine percent of the water absorbed in plants transpires into the atmosphere. The second video in a three-part series explains transpiration in plants. It details how they pull water into the roots; how water passes through the xylem; and finally how water transpires through the stem and leaves.

Concepts

transpiration, leaves, roots, xylem, stomata

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Additional Tags

science

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Instructional Ideas

• Use a straw to demonstrate how liquid leaving the top of the system pulls in more liquid in the bottom
• Discuss why more evaporation happens from leaves than stems in the same weather conditions

Classroom Considerations

• Assumes prior knowledge of the structure of leaves

• This video is hosted on YouTube

Pros

• Designed to help prepare for the GCSE
• Clear diagrams enhance the concept

Cons

• None

Common Core

RST.6-8.4 RST.9-10.4 RST.11-12.4