Students recognize that a particular color change is a characteristic property of a substance and that a color change can also be used as evidence that a chemical reaction has occurred. Students will ...

Every chemical reaction involves a change in energy because different substances hold different amounts of energy. During the reaction, bonds inside the substances that are reacting together must ...

A chemical reaction is when one or more substances change and produce one or more new chemical substances. The substances that are involved in a chemical reaction and that are changed by it are ...

Today I'm going to be doing one of the weirdest chemical reactions I've ever seen. It called the Belousov–Zhabotinsky reaction, and it's one of the only known oscillating chemical reactions.

Because substances are made up of different atoms and molecules, they react in characteristic ways. Production of a gas, color changes, a change in temperature, and the formation of a precipitate are ...

Enzymes are large biological molecules—usually proteins—that speed up chemical reactions. Molecules that speed up chemical ...