A typical question is about energy transfer - Explain the process of convection and give an example of where we can find them
Molecules in the air encounter an energy source, they gain energy and begin to heat up which causes them to vibrate faster and become less dense which causes them to rise. As they rise, they begin to lose energy, move slower and become more dense which causes them to drop again. This process is repeated.Convection currents are found in the mantle below the Earth's crust and in some kitchen appliances.
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