CLUES: 1. Change in the shape, size, volume, and state of a substance.
2. Change in the composition or atomic make-up of a substance.
3. Physical change from liquid to gas or vapour.
4. Process that causes changes in a substance's composition with the
aid of fire.
5. Takes place when oxygen and moisture in the air combine with the
metal.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.