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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

Plant kingdom

group of living things which make their food using chlorophyll

Plasma

fluid part of the blood which carries everything apart from oxygen around the body

Population size

number of individuals in a species in a specific area at a specific time

Porous

a rock with spaces between the grains

Predators

an animal which hunts other animals for food

prescription

form written by a doctor to get medicines, includes antibiotics

Prey

an animal which is hunted and eaten by another animal

Primary colours

three colours (red, blue and green) that combine to give all the other colours seen by the human eye

Primary consumer

the first animal in a food chain; it always eats the producer

Producers

plants, which produce their own food using energy from the Sun

Product

a substance that is made during a chemical change

Properties

the characteristics of a substance

protein

food needed for growth and repair of tissues, also used to make enzymes.

Pyramid of numbers

a diagram showing the number of organisms at each level of a food chain


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