A Simple Hot and Cold Water Density Science Experiment
A simple hot and cold water density check is super easy and fun! First, you need two clear glasses, some food colouring, and hot and cold water.
Prepare the glasses: Fill one glass with cold water and the other with hot water. Make sure the water levels are the same in both glasses.
Add food colouring: In the cold water glass, add a drop of blue food colouring. In the hot water glass, add a drop of red food colouring. Watch how the colours behave in the water.
Observe: In the cold water, the blue food coloring will slowly spread out and mix with the water. In hot water, the red food colouring will spread much faster. This happens because hot water has a lower density than cold water, so the molecules move more quickly.
Combine: Carefully pour the cold water with blue food colouring into the hot water glass with red food colouring. You'll see the blue cold water sink to the bottom, and the red hot water will rise to the top. This is because cold water is denser than hot water, making it sink.
This simple experiment shows how temperature affects water density and creates a cool visual effect with the colours. It’s a fun and easy way to learn about science right at home!
