Chemical change is any change that results in the formation of new chemical substances. Chemical changes take place on the molecular level. Another way to think of it is that a chemical change accompanies a chemical reaction. To find if a Chemical Change is occurring you need to determine whether a new substance has formed because of the change. If a new substance has been produced, then a chemical change has occurred. The new substance formed in a chemical change could be a solid, liquid or gas. it talks about how chemical changes make new substances and it also describes how you can see or observe if a new substance is made .You can detect the presence of a new substance by: seeing a change in colour, smelling a gas , seeing bubbles
