Question

3. Heating a piece of iron, is considered a
[physical/chemical] change, while
heating a piece of coal (carbon) is considered a [physical/chemical] change.
4. Chemical changes may involve exchange of energy in the form of
[light/sound/magnetic/heat].

Spammers stay away or else I will report​

Answer 1

Answer:

Common Physical Changes. Texture. The texture of a substance can differ with a physical change. For example, if a piece of wood was ...