The Chemical Revolution was a period of time in history when scientists developed new theories and discoveries about chemicals, which are the stuff that makes up everything in the world. During this time, people figured out that substances could be broken down into smaller elements, like Oxygen and Hydrogen, and that each element had different properties. This led to the development of many new technologies and products that weren't possible before. For example, scientists used this new knowledge of elements to make different types of medicines, plastics, and fuels.