KITCHEN CHEMISTRY COURSE - MOLECULES

We have started doing an online course called Kitchen Chemistry. It has been organised by The University of East Anglia. Today we learned about MOLECULES.

What are molecules?
Molecules are made of ELEMENTS.

WATER is made of molecules which are made of the elements HYDROGEN and OXYGEN.
SALT is made of molecules which are made of the elements SODIUM and CHLORINE. The scientific name for salt is SODIUM CHLORIDE.

We learned that there are gazillions of molecules all around us. There are more water molecules in one glass of water than there glasses in the whole world.

We learned today that molecules become less DENSE when they are heated. This means that they spread out. This is what makes HOT AIR BALLOONS fill up and rise. We made our own hot air balloon using a cardboard box, our toaster and a bin liner. These pictures shows what happened: