Ratio and Proportion

This collection of STEM resources is based around ratio and proportion, area and volume.  Resources are listed in order of stage.

Mixing Lemonade

Age 11 to 14
Challenge Level

Can you work out which drink has the stronger flavour?

Food Chains

Age 11 to 14
Challenge Level

When a habitat changes, what happens to the food chain?

Tray Bake

Age 11 to 14
Challenge Level

My recipe is for 12 cakes - how do I change it if I want to make a different number of cakes?

Pinhole Camera

Age 11 to 14
Challenge Level

Make your own pinhole camera for safe observation of the sun, and find out how it works.

Toad in the Hole

Age 11 to 14
Challenge Level

Is it cheaper to cook a meal from scratch or to buy a ready meal? What difference does the number of people you're cooking for make?

Like Father Like Son

Age 14 to 16
Challenge Level

What is the chance I will have a son who looks like me?

Investigating the Dilution Series

Age 14 to 16
Challenge Level

Which dilutions can you make using only 10ml pipettes?

The Genes of Gilgamesh

Age 14 to 16
Challenge Level

Can you work out the parentage of the ancient hero Gilgamesh?

Molecular Sequencer

Age 14 to 18
Challenge Level

Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.