Chemistry: Age 12

8 illustrated Chemistry lessons for Age 12.

The Fire Triangle A fire can only burn when it has fuel, heat and oxygen all at the same time. Remove just one of the three and …
Ice, water and steam in the kitchen Water can be a solid (ice), a liquid, or a gas (water vapour), and heating or cooling it makes it change from …
Four ways to separate a mixture A mixture can be pulled apart because its components have different properties, such as size, boiling point or…
Water Changes State Ice can melt into liquid water, and liquid water can boil into steam. Steam can cool back into liquid water; t…
Soap Molecules and Oil Soap molecules have a round head that mixes with water and a wavy tail that mixes with oil. They gather around…
Salt from Seawater When seawater evaporates, the water rises into the air as vapour. The dissolved salt stays behind and forms wh…
Heat Trapped in Air Some gases in the air soak up heat that rises from the ground and send it back down. This keeps the lower air …
Separating Sand and Salt from Water Water can carry sand that stays in lumps and salt that dissolves into it. Filtering traps the sand, and heatin…