Answer:
Evaporation and convection are both heat transfer processes that transfers heat from hotter to colder regions. Evaporation however involves a change of state of the molecules whereas convection does not, rather occurs due to difference in densities of the molecules.
In the water cycle, both evaporation and convection work to lift liquid water from the earth's surface into the atmosphere where they condense into water vapor and eventually fall as rain.
Explanation:
Evaporation is a process by which a liquid turns into vapor when it absorbs heat.
Convection is the process of heat transfer by the actual movement of the heated molecules from one region to another.
Comparison:
Both processes involves transfer of heat
Both processes involves movement of molecules
Contrast:
Evaporation involves a change of state of the molecules, whereas convection does not.
Evaporation is a surface phenomenon whereas convection occurs throughout the whole fluid in cycles
Evaporation results takes heat away from a body whereas convection transfers heat to a body
In the water cycle, when the heat from the sun heats up the earth's and water surfaces, the water molecules absorb heat and turn to water vapor by the process of evaporation. The water vapor rises into the atmosphere.
During convection in the water cycle, heated air near the earth's surface rises as it becomes less dense than cold air and carries along water vapor with it into the atmosphere. As the hot air water vapor mixture rises, it becomes cold and condenses into water vapor which later falls as rain.
