Fill the plastic container
with water leaving a gap.
2. Place the lid
securely on the plastic container
and mark where the water level stops.
3. Place the container
in the freezer, giving it plenty of
time to freeze (over night would be
4. Take the container
from the freezer.
What has happened to the water?
gets extremely cold it changes its
form and turns from a liquid (water)
to a solid (ice).
takes up more space when it freezes.
the water changes to ice it expands
and pushes the lid off the container
(as the ice needs more space).