Understanding of chemical changes began when people began experimenting with chemical reactions in a systematic way and organizing their results logically
Knowing about these different chemical changes meant that scientists could begin to predict exactly what new substances would be formed and use this knowledge to develop a wide range of different materials and processes
It also helped biochemists to understand the complex reactions that take place in living organisms
The extraction of important resources from the earth makes use of the way that some elements and compounds react with each other and how easily they can be 'pulled apart'
