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Transpiration in plants

Adjust humidity, air movement, temperature and stomatal opening. Compare a simplified relative water-loss index.

Simulation
Transpiration in plants: Root uptakeRoots → xylem → leaf → airWater vapourRelative index: 37.5Blue dots illustrate flow; they are not counted water molecules.

Investigate and explain

  1. Record the index at 20%, 50% and 80% humidity, keeping other controls fixed.
  2. Repeat for air movement. Explain why it has diminishing influence here.
  3. Close stomata and describe the trade-off between conserving water and taking in carbon dioxide.

Practice · question 1/3

With everything else fixed, higher humidity usually…

Choose once, then discuss your reasoning.

First attempts: 0/0

Assignment and explanation guide

Write a claim, support it with two observations from this activity, and explain one model limitation. Compare with a partner. A strong answer names the structures or processes, controls relevant variables and distinguishes the illustration from biological evidence.