How does evaporation happens?

Answer 1

Evaporation is the process by which water is converted from its liquid form to its vapor form and thus transferred from land and water masses to the atmosphere. Evaporation from the oceans accounts for 80% of the water delivered as precipitation, with the balance occurring on land, inland waters and plant surfaces.

Answer 2

sorry if this sounds really simple. it was just the way i can easily tell you about it:

when water particles are heated a physical change happens. the chemical links between the hydrogen and oxygen molecules are broken up. this causes the water to evaporate and rise up. this process is reversible.