Cold as Ice
What you need:
A balloonwater
A sink
A pen
A tape measure
A freezer
What to do
Carefully fill the balloon ¾ with water and tie the top.Measure the distance round the balloon at the widest point.
Put the balloon in a freezer overnight.
Take it out and look closely to see what has happened.
What happened
The circumference of the balloon increased by 3 cm.Conclusion:
When water freezes it expands.Jack
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