Question

the sun heats the surface of the oceans which causes water to evaporate. How does the rate of evaporation depend on:
i) the wind speed
ii) the temperature
iii) the humidity

Answer 1

i) The higher the wind speed the lower the pressure above the surface of the water. Pressure determines how much energy is required for a molecule of water to escape the liquid. The lower the pressure the lower the boiling point. So the rate of evaporation would be higher with higher wind speed.
ii) The temperature adds or subtracts energy from the water, if it adds energy then more water molecules will reach the energy required to break free from the other liquid state molecules to enter the air.
iii) the humidity is the number of water molecules already in gas state. If humidity is high then more water molecules will be entering the water which offsets the ones that are exiting it. Evaporation is the sum of molecules exiting the water - the ones entering it.

So I think evaporation will be proportional to winds speed and temperature and inversely proportional to humidity.