Convection is described as the movement of particles of gases and liquids away from a heat source to form currents. Heat from the core causes convection currents. This clip is from : KS3 Curriculum Bites , Want 2Tlk Science Convection currents can be seen in lava lamps. Insulation is used to stop heat energy transfers from buildings and the human body.
Conduction, convection and radiation Energy can be transferred by conduction, convection and radiation. The wax inside the lamp warms up, becomes less dense than the liquid and so rises. In some places the crust is destroyed. These currents slowly move the crust around. Convection in a liquid can be seen by putting a crystal of potassium permanganate in a beaker of water and gently heating it with a Bunsen flame. These currents slowly move the crust around. Convection currents and plate movement The Earth's crust is broken up into pieces called plates. When it rises, it cools and becomes denser again, so it sinks. in the mantle. The crust moves because of movements deep inside the earth.
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