The Convection Uprising of 2001!

Matter heats up, becomes less dense and rises.

Matter cools down, becomes more dense and sinks.

Looks like Magma! Add a little (internal) heat... ... and watch the convection!
Hot magma Rises... ...plates move apart... ...a diverging boundary !
Cool magma sinks... ...plates come together... ...a converging boundary !
The asthenosphere is liquid, the lithoshpere is solid plates and internal heat causes convection!
Magma rises between South American & African
South America & Africa plates drift apart! (diverge)

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