Question

Select each process that shows a physical change. Select all that apply.

Several logs chopped into pieces.
Chopping Wood

Logs burning as in a campfire.
Burning Wood

A pot of water on a grate over a burning fire.
Heating Water

A marshmallow on a stick held above a fire.
Roasting Food

Answer 1

Physical changes:
- Several logs chopped into pieces (Chopping Wood) — only size/shape changes.
- A pot of water on a grate over a burning fire (Heating Water) — heating/phase change, no new substance formed.

Not physical changes:
- Logs burning (Burning Wood) — combustion = chemical change.
- A marshmallow over a fire (Roasting Food) — browning/charring = chemical changes.