Browse the glossary using this index

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R

Refraction

bending of light when it moves from one material to another of different density

Repel

force pushing something away

resistant

when bacteria are not affected by antibiotics

Retina

light sensitive surface at the back of the eye

rickets

disease caused by a lack of vitamin D in the diet

Rock cycle

a way (usually a diagram) of linking all the processes involved in the formation of rocks

Roots

part of the plant usually below ground which anchors the plant and absorbs nutrients

rot

substances broken down by chemical action of microbes

S

Sample

the measured area used for sampling

Sampling

method for estimating the population size


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