List

Ratio And Proportion

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

Toad in the Hole
problem

Toad in the Hole

Age
11 to 14
Challenge level
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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?
Mixing Lemonade
problem
Favourite

Mixing Lemonade

Age
11 to 14
Challenge level
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Can you work out which drink has the stronger flavour?

Food Chains
problem

Food Chains

Age
11 to 14
Challenge level
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When a habitat changes, what happens to the food chain?
Tray Bake
problem

Tray Bake

Age
11 to 14
Challenge level
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My recipe is for 12 cakes - how do I change it if I want to make a different number of cakes?
Pinhole Camera
problem

Pinhole Camera

Age
11 to 14
Challenge level
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Make your own pinhole camera for safe observation of the sun, and find out how it works.
The genes of Gilgamesh
problem

The genes of Gilgamesh

Age
14 to 16
Challenge level
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Can you work out the parentage of the ancient hero Gilgamesh?
Molecular sequencer
problem

Molecular sequencer

Age
14 to 18
Challenge level
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Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.
Peas in a pod
problem

Peas in a pod

Age
14 to 16
Challenge level
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What is the chance this pea plant will look like its parents?