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Browse the glossary using this index

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S

Sample

the measured area used for sampling

Sampling

method for estimating the population size

Scattered

disorganisation of light

Secondary consumer

the second animal in a food chain; it always eats the primary consumer

Sedimentary rocks

rocks formed from deposited rock fragments

Sediments

fragments of broken rock that have been deposited

Sexually transmitted disease

microbes passed onto others during sexual intercourse

Shadow

area of darkness where light is blocked by an object

Sodium

a silvery metallic element that explodes on contact with water

Source

place which light or heat comes from

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