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Transfer of heat: Heat is a form of energy.we can feel it form a distance.Heat can be transferred from one body to another which is in contact with each other.There are three ways to transfer the heat convection,conduction and radiation. Conduction: In this,Heat transfer from hot end to the cold end when it is in contact with fire or heated objects. Example:when we are cooking in our home if we leave the spoon in the vessel after sometime we can observe the heat in the spoon why it is so? Only the vessel is kept in contact with fire. the heat is transferred from hot end to the cold end. Convection: In this two types are there convection in water and in air.At first we will take water and drop some potassium crystals to the bottom of the flask.Now allow it to heat.we can observe that the heated water goes up and the gap is filled by the cold water from the sides.Likewise in air,a candle is lighted and we are keeping our hands on the sides of the candle about some distance apart we can feel the heat but not much heat.But if we place the hand on the top of the candle we can feel the heat more.This is example for the convection in air. Here also same thing is happening heated air goes up and the cool occupies its space. For example,parachute if we increase the fire it will go upwards.Because hot air is lighter than the cool air. Because of this sea breeze and land breeze takes place. During day time the land gets heated faster than the sea.so the heated air from the land goes up and the cool air from the sea moves towards the land with high pressure again it get heated and goes up and create low pressure,it will form a cycle.This is known as sea breeze.It will be opposite for land breeze the cool air moves towards the sea during night time. Radiation: Radiation is nothing but the emission.It takes place in light and also in heat.It does not require any medium.It may takes place in vacuum also.For example,The regular radiation we are seeing most is light and heat from the sun and also the heat from the hot water transfers to the surrounding.