Experiment 9:
Hot and cold air
This
experiment will demonstrate what happens to air which is heated
Introduction:
Materials
required:
A balloon
An empty bottle
A basin with hot water
Experiment:
The
air, now affected by the cold, contracts ( that is, the molecules come closer
together). And so the air occupies only the space in the bottle
The
balloon deflates
What
happens?
What
happens?
Now
run the cold water tap on the balloon
Inflate
the balloon slightly and place on the neck of the bottle
Hold the bottle for a minute or two in the hot water
The
air, like all substances, is made up of tiny, moving particles called molecules.
The heat makes these molecules move apart. This mean that the air inside the
bottle spreads and therefore it needs more space. So it enters into the balloon
and inflates it
The
balloon inflates