Browse the glossary using this index

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N

nutrients

substances in your food which are needed and used by your body.

nutritional label

label found on food packaging which states the amount of each nutrient.

O

Omnivore

animals that eat both plants and animals

Opaque

a material that does not allow visible light to pass through it

Oxygen

a colourless non-metallic element that is a gas involved in burning

P

pathogen

organism which causes disease

penicillin

first antibiotic, discovered by Sir Alexander Fleming

Periodic Table

the table showing all the elements

Physical

properties concerning changes that do not involve the formation of a new substance

Pitch

how high or low a sound is


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