Convection ____ happen when gases or ____ are heated. The heat ____ causes the ____ in the gas or liquid to move further ____. This makes them ____ dense and causes them to ____. As the matter moves further away from the heat source it ____ down, the particles move ____ together, it becomes ____ dense and then ____. This ____ then continues.

S1 Convection Currents

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排行榜

視覺風格

選項

切換範本

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