The sun causes evaporation through a process called solar radiation. Solar radiation is the energy that comes from the sun in the form of electromagnetic waves. When these waves hit the Earth, they are absorbed by the surface, which causes it to heat up. As the surface heats up, the molecules of water in the soil, plants, and bodies of water gain energy and begin to move faster. This increased motion causes the molecules to spread out and form a gas, which is water vapor. Water vapor is then released into the atmosphere, where it can condense and form clouds.

The rate of evaporation depends on several factors, including the temperature, humidity, and wind speed. Higher temperatures cause water molecules to move faster and evaporate more quickly. Lower humidity levels also increase the rate of evaporation, because there is less water vapor in the air to compete with the water molecules that are trying to evaporate. Wind can also increase the rate of evaporation, because it helps to carry away water vapor from the surface of the Earth.

Evaporation is an important part of the water cycle, which is the continuous movement of water between the Earth's surface and the atmosphere. Evaporation is the process that turns liquid water into water vapor, which is then transported through the atmosphere by winds. When the water vapor condenses, it forms clouds, which can eventually produce precipitation in the form of rain, snow, sleet, or hail. Precipitation then falls back to the Earth's surface, where it can be absorbed by plants, evaporate again, or run off into bodies of water.