This activity uses the Atom viewer to explain the behaviour of gases, liquids and solids in a variety of situations. Experiments involving use of the Atom viewer help students understand the behaviour of the three states of matter and encourage students to explain and interpret various situations.

This item teaches:

• about the arrangement of molecules/ atoms in liquids
• about the reversibility of changes in states of matter
• about the energy changes associated with changes in state
• about the arrangement of molecules/ atoms in solids
• about the arrangement of molecules/ atoms in gases