A colloid is a mixture in which one substance(such as salad oil), is mixed as fine drops or bubbles in another substance (such as water). A liquid/liquid colloid such as oil in water, is called emulsion. 

A gel is a liquid in a solid

An aerosol is a liquid or solid in a gas

A foam is a gas in a liquid.

You need to remember which is the continuous and which is the disperse phase. The disperse phase is spread throughout the continuous phase. So in a foam, the disperse phase is the gas and the continuous phase is the liquid.

Here is Hannah and Jades’ work. Well done girls!

We used ticker tape attached to trolleys to look at how the speed changed as the trolleys went down the runway.

 click for more results graphs
previous work : http://www.divshare.com/download/2029918-222

work by Rosario, 7EM

This is a good DVD on the space race – shown on BBC2 fairly recently