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F

fat

substance found in food, used as an energy store and part of cell membranes.

fermentation

breakdown of a substance by bacteria or yeasts, usually without oxygen

fibre

food used to keep waste moving through your digestive system.

Filtered

solid bits are separated from a mixture

Food chain

a diagram showing what an animal eats and what eats it

Food web

a diagram made of lots of joined up food chains, showing what eats what in a habitat and the flow of energy

Fossils

remains of plant or animal material found in rock

Freezes

changes from liquid to solid state

Frequency

number of vibrations a second