Challenge your
friends to move oil
and water without
touching them
1. Put some water and
oil in to the container
and leave for a few
minutes.
You will need:
 A freezer
 Water and vegetable oil
 A plastic container
2. The oil should settle on top
of the water. Now put it into the
freezer and leave for a few
hours.
3. Take out of the
freezer. The oil should
now be below the
water.
What’s going on?
As water freezes, it changes from a liquid to a solid. Unlike most
liquids, water expands when it cools, which means that the particles
take up more space. This is a decrease in density. As the density of
the oil doesn’t change, the ice floats to the top of the oil.
What is a Reversible Reaction?
There are three states of matter; solid, liquid and gas. The state
can change from one to another. For example, if a liquid is cooled, it
will freeze and become a solid. If a solid is heated up, it will melt.
Something's can keep on changing between states, like water. This
is called a reversible change. Some things cannot change back like
an egg. This called an irreversible change.
www.thinktank.ac/experiment
Disclaimer: The science experiments on this website are regarded as low risk. The authors expressly disclaim all liability for any occurrence, including, but not limited to, damage, injury or death which might arise as consequences of
the use of any experiments listed or described here. We recommend that you discuss any of these experiments with a responsible adult before carrying them out and follow the instructions within the experiments carefully.
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Freezing Oil And Water