Science Test Worksheets - John Buchan Middle School Page 4
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162.
Smoking and health
(a)
Some children watch a video showing what happens when air passes through a
lighted cigarette.
The video shows a scientist using this model.
The scientist squeezes the plastic bottle. This forces air out.
Then she lets go. This forces air back into the bottle, through the lighted cigarette.
She does this several times. The cotton wool becomes black and dirty.
What is taken into the bottle with the air and makes the cotton wool dirty?
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1 mark
John Buchan Middle School
4
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