When there is more heat.
Evaporation (not vaporization) occur at any temperature; a higher temperature increase the rate of evaporation.
A greater surface area from which evaporation can occur.
For evaporation to occur you need the following: Heat (energy), and water.
When water molecules at the surface gain sufficient energy they can escape in the atmosphere. Evaporation (not vaporization) occur at any temperature; a higher temperature increase the rate of evaporation.
Air Temperature, because the surface of the water is the only thing that needs to be heated so the warmer the air temperature, the faster the air can heat the surface of the water the faster evaporation will be able to occur,
When the umbrella is opened its surface is now bigger than if it was closed. If the surface is bigger, the water evaporation will occur faster.
chemicak change occur
=well it has to be hot for evaporation to occur but no it doesn't have a fixed temperature!=
because it is faster
When the exposed surface of water is larger the evaporation is faster.
The larger the area the faster the evaporation.