Animals that live in salty water have to control the amount of salt in their bodies, or they will not survive. But how do they do it? This activity will help show you.
Here are two egg experiments in one! Turn your eggs rubbery by dissolving their shells, and then make one grow and the other shrink with the power of salt water.
It’s drier than any desert on Earth. On Mars, pure water exists only as a gas or a solid. Vast amounts of ice are found at the north and south poles and buried underground, but there’s not a drop to drink.
To make ice-cream we use a whole bunch of different principles from physics and chemistry. In our video, we use salt to reduce the freezing point of water to make delicious, homemade ice-cream in minutes.
