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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?
Make your own pinhole camera for safe observation of the sun, and find out how it works.
My recipe is for 12 cakes - how do I change it if I want to make a different number of cakes?
What is the chance this pea plant will look like its parents?
Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.
Can you work out the parentage of the ancient hero Gilgamesh?
Which dilutions can you make using only 10ml pipettes?