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.
The opposite of condensation is evaporation. Evaporation is the process of changing liquid water into water vapor (a gas). It transports water from the Earth's surface to the atmosphere. Evaporation is a cooling process. For water molecules to go from a liquid to an energized gaseous state, they must first absorb heat energy.