Question

what do all physical changes have in common? the substance looks different, but its still the same substance. the substance turns into something completely new. submit

Explanation:

Physical changes only affect the physical properties like shape, state (solid - liquid - gas), or appearance of a substance. The chemical composition remains the same. For example, melting ice (solid - liquid) is a physical change as it is still water (H₂O). In contrast, when a substance turns into something completely new, it's a chemical change.

Answer:

In physical changes, the chemical composition of the substance remains unchanged.