The magazine says it tested 10 insect repellents in an outside laboratory, where volunteers let deer ticks crawl on them and also exposed themselves to mosquitoes. Six of these repellents earned a recommended rating from Consumer Reports. These six repellents, along with their active ingredients and cost, are:
Evaporation vs. Boiling Boiling occurs when the temperature of the liquid is greater than the boiling point of the substance. Evaporation can occur at any temperature.
Lesson Summary. Evaporation is a process during which water in a liquid state changes to gas or vapor. Water starts evaporating at 32 degrees F (0 degrees C), but it happens very slowly. The higher the temperature, the higher the rate of evaporation; however, evaporation cannot occur if there is no water available.