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Geography

The study of physical characteristics of earth and the distribution and effects of life on earth, especially that of humans.

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Geography > Physical geography

permeable

Geography; Physical geography

A rock which can absorb water (porous) or allow water to pass through cracks and joints (pervious).

magma

Geography; Physical geography

Molten rock below the surface, either held within the crust or in the mantle.

epicentre

Geography; Physical geography

The point on the surface directly above the focus of an earthquake.

impermeable

Geography; Physical geography

A rock which cannot absorb water and does not allow it to pass through.

lava

Geography; Physical geography

Molten rock flowing on the surface. Until it reaches the surface it is still called magma.

knickpoint

Geography; Physical geography

The point where an old profile meets a new profile in a rejuvenating river.

turbine

Geography; Physical geography

A rotary motor driven by a flow of water, steam or wind to produce electrical energy.