UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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how are convection currents produced?
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hot materials within the earth rise to the surface, and cool materials sink where they are heated
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cool materials within the earth rise to the surface, and hot materials sink where they are cooled
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.
Detailed explanation-2: -Convection currents form because a heated fluid expands, becoming less dense. The less-dense heated fluid rises away from the heat source. As it rises, it pulls cooler fluid down to replace it. This fluid in turn is heated, rises and pulls down more cool fluid.
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