Convection in liquids

Aggelina Bania

Materials needed

We use icing color cubes.

Preparation

We put some cold water in a small bottle.

Container 1

We colour the cold water blue.

We cover the bottle with aluminum foil.

Container 2

We heat some water.

We colour the hot water red.

We put water in room temperature in a larger container.

Container 3

ACTION!!!

We place the bottle with the cold water in the container with the water in room temperature.

We open a hole in the aluminum foil.

We place the bottle of hot water opposite to the bottle of cold water in the same container.

We also open a hole in the aluminum foil.

And then we wait….

We notice that cold blue water flows from thefirst container outwards and stays at thebottom, while hot red water flows from thesecond container outwards and goes up.

And as the time passes by, the phenomenon becomes more clear…

Conclusion: Hot streams move upwards, while cool streams go down!!!

And why is that?

Cold water has a greater density than hot water, so cold water stays down and hot water goes up!!

THE END!!