The subtropics

The subtropics are located between the tropical and temperate zones, between 23.5° and 40° latitude in both hemispheres.

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The oxygen cycle describes the movement of oxygen within its three main reservoirs.

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A glacier is a large body of ice that forms from snow, and is in constant, slow motion.

The water cycle (intermediate)

Water on Earth is in a continuous state of change. The water cycle includes processes...

Tectonic plates

Tectonic plates can move in relation to each other.


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