Question

Energy transfer occur through out the Earth. Click on the area that experiences energy transfer through CONVENTION.

Question completion Status: QUESTION 28 Energy transfers occur through out the Earth. Click on the area that experiences energy transfer through convection. Solar -70 (Energy lost to space) +160 (Energy gained by atmosphere) +23 Infrared +19 -64 -96 -160 Latent heat (Energy lost by atmosphere) Infrared Convection and conduction Evaporation Infrared -117 +51 +147 -147 (Energy lost at earth surface) Selected Coordinates Clear (Energy gained at earth surface) Click Save and Submit to save and submit. Click Save All Answers to save all answers

Answer 1

Convection is the process of heat transfer by the means of moving fluid. This is the process which helps in boiling water. The heat is transferred from the bottom of the pan to the top by upward moving water. When the hot water from below moves up, the colder water from the top moves down. This cycle effectively transfers the heat from the bottom to the top layer. Heat transfer in the atmosphere also takes place due to the upward movement of hot air and subsequent downward movement of the cold air mass. This cycle of air movement is limited in the lowest layer of the atmosphere. This layer is upto 8 km height near the poles and 18 km near the equator. This is the height of the Tropopause. Air mass below this height experiences convection. This portion has been marked on the given image.
Heat convection also takes place in the mantle layer of the earth. This layer is below the lithosphere layer. This layer is absent in the picture. Mantle remains in a semi molten state and there is a steep temperature gradient prevailing in the mantle. This helps in the movement of the semi-liquid layer.
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Solar -70 (Energy lost to space) Portion of atmospheric convection +160 (Energy gained by atmosphere) Infrared 23 -111 +19 -96 - 160 Latent heat (Energy lost by atmosphere) Infrared Convection and conduction Evaporation Infrared -117 +51 +96 -147 (Energy lost at earth surface) Selected Coordinates +147 (Energy gained at earth surface)