Observe the difference in density between cold and warm water
Duration: 20 min
Type of activity: experiment
Materials required: a tray (or use a sink if one is nearby), two identical glasses, some cardboard, two types of food colouring, very cold water, hot water
Follow the experimental protocol in this video step by step to show the difference in density between cold and hot water.
Cold water is more dense than hot water and will sink to the bottom of the glass. This is what happens in the ocean. As the cold-water particles are more compact, the water is more dense and ends up at the bottom of the ocean.
To carry out this experiment, you can download an activity sheet presenting the steps and a discussion section.