Chemical changes, or reactions, result in the formation of new substances when bonds are. formed and/or broken. Some relatively simple but common types of chemical reactions are. illustrated in this experiment. Examples and descriptions of each type appear below.
Water boils when it reaches 212 degrees Fahrenheit. Water at a high altitude (for example, in a town in the mountains) doesnât have to get as hot in order to boil. In fact, water doesnât have to boil in order to turn from a liquid to a gas! For example, water at the surface of a lake can evaporate, or change to water vapor when heated by the sun! Sources & links.
When you boil water the heat source is from the bottom. The water at the base of the pan heats up first and then this slowly heats up the water above it. When the water gets to boil it is the water at the bottom that boils first, as it is the hottest. The water changes from a liquid to a gas.