Investigating transpiration (AQA GCSE Biology): Quizzes

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Investigating transpiration
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What equipment is used to measure transpiration rate in plants?

Potometer

What does a potometer directly measure?

Water uptake by the plant

How does a potometer track transpiration?

By tracking an air bubble in a tube

What happens to transpiration rate when light intensity increases?

Transpiration rate increases

Why does more light increase transpiration rate?

Stomata open wider for gas exchange

What effect does increased temperature have on transpiration rate?

Transpiration rate increases

How does temperature affect water loss from leaves?

Heat makes molecules move faster

What happens to transpiration rate when air movement increases?

Transpiration rate increases

Why does wind increase transpiration rate?

It blows water vapour away from leaves

When are plants most likely to wilt?

Hot, windy, sunny weather

Why is transpiration rate lower in still air?

Water vapour builds up around leaves

What formula calculates water volume used? (rr = radius, distance in mm)

Volume = distance × πr2\pi r^2

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