define:
1.conduction
2.convection
3.radiation
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Radiation-The process by which heat of the sun comes to us is known as radiation.
Convection-When water is heated the water near the flame gets hot. Hot water rises up. The cold water from the sides move down towards the source of heat. This water also gets hot an rises and water from the sides move down. This process continues till the whole water gets heated . This is called convection
Conduction-The process by which heat is transferred from the hotter end to the colder end of an object is known as conduction
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