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Teachers will need to ensure
that care is taken when handling hot water.
Print off the student's worksheet
and photocopy one for each student.
Ask students to carry out
the activity from the worksheet then go over their results at the end
of the class.
Questions and solutions
1. What do
you see when the bottle is covered with ice and cold water?
Condensation inside the bottle.
Bottle being crushed.
2. Try to
explain your observations.
The
pressure of the air inside the bottle is now much less than the pressure
exerted by the atmosphere. So the air pressure outside the bottle crushes
it.
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