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.
Detail of Water Evaporation and Boiling Nothing happens to the water molecules themselves, except that they move faster. Boiling is a physical change, not a chemical one. All that happens is the weak attractive forces between different water molecules are broken and individual molecules are turned into a gas, which is steam.