The focus is that matter, whether solid, liquid, or gas, is made up of particles ... The activity sheet will serve as the Evaluate component of the 5-E lesson plan. Remind students that they have seen ...

Solids, liquids and gases. In a solid like this brick, the particles are regularly arranged touching their neighbours and move only by vibrating. This explains why solids have a fixed shape.

After freezing, the water molecules are further apart than they were as liquid water. As solid ice, the molecules are further apart, arranged in an orderly pattern, and not able to slide past each ...