Social Sciences and History / Unit 10 SSH 0918 short lesson, about 20 seconds
The Rock Cycle
Captions available
The idea
The rock cycle begins with magma, molten rock below the surface, or lava, erupted above it; cooling crystallizes minerals into igneous rock. Weathering breaks rock into fragments and erosion removes them; the sediments, gravel to clay, become sedimentary rock. Heat and pressure make metamorphic rock.
In practice
Igneous from ignis, fire.
Where people slip
Minerals are the cycle's units.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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