Activity and Phase change

Activity noun - Energetic movement of the body for the sake of physical fitness.

Phase change and activity are semantically related. In some cases you can replace phrase "Phase change" with "Activity", this terms are similar.

Nearby Words: action, active, activate, actively, activist

Phase change noun - A change from one state (solid or liquid or gas) to another without a change in chemical composition.

Activity and phase change are semantically related. You can use "Activity" instead a noun phrase "Phase change".