In this lab, you will fill out a foldable on the three primary states of matter. Then you will watch a video showing ice melting from a ... Observe the temperature at each phase change. Students: You ...

Solid, liquid and gas are the three main states of matter. When a substance changes state, this is a physical change because no new substances are produced and the change is reversible.

Substances can exist in three states of matter - solid, liquid and gas. Substances can change states. To change the state of a substance energy must be transferred to, or from, the substance.