2.4 What did we learn? - Mid level quiz

Why was baking soda used in this experiment?

It makes the water fizz

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It makes the leaves float

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It provides the leaf with carbon dioxide

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What gas do plants release into the air

Oxygen

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Carbon dioxide

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Water vapour

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Why did the leaves sink at the start of the experiment?

Leaves are heavier than water

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There was very little oxygen in them

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I pushed them down with my finger

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Why did the leaves begin to float when the light was turned on?

Water is heavier than the leaves so they float

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The oxygen produced by the leaves made them float

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Because the light made the leaves float

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2.4 What did we learn? – Mid level quiz