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SAI INTERNTIONAL SCHOOL
                                                        Class 7
                                                   Lesson Notes
                                                 Subject- Physics
                                           Ch- Heat and Temperature
                                              Subtopic- Convection


                   Convection:


                   Convection is the process of transfer of heat in which heat is transferred in
                   fluids through the actual movement of particles.

                         Heat transfer in liquids and gases takes place through convection.
                         This method of transfer of heat takes place in liquid and gases only as
                          their particles are loosely packed and free to move.
                         Sea breeze and Land breeze are the example of convection currents.




                   Sea Breeze:

                   During the day,the land gets heated up faster than the sea water.The air above
                   the lands gets warmer and rises up.

                   The cool air above the sea moves towards the land to fill the empty space
                   created by the rising warm air.This movement of cold air from sea to land is
                   called Sea Breeze.




























                   Land Breeze:
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