Students explore the concept that chemical reactions involve the breaking of bonds between ... Students investigate reactions which produce a gas, form a precipitate, and cause a color change.

Looking at some common but simple chemical reactions is a good way to encourage students to think about what might be going on at a molecular level. Choosing reactions where clear observations can be ...

Many students have difficulty perceiving a chemical reaction as a dynamic process. This is sometimes not helped by the way in which they learn about these changes. Often they are presented with ...

They began to study areas such as: How living things get energy from food The chemical basis of heredity What fundamental changes occur in disease Biochemistry includes the sciences of molecular ...

Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change, bubbles, or a colour change.