Question

review
✓ all changes in matter are either physical or chemical.
✓ a physical change affects the form of the matter, but it does not change its identity.
✓ a chemical change creates a new substance, changing the identity of the matter.
how do we know when matter has gone through a physical change?
type your answer here
rewatch
next question

Explanation:

A physical change is identified when the matter's form (like state, shape, size) changes, but its chemical identity (what substance it is) remains the same. For example, melting ice (solid to liquid water) or breaking a glass—no new substance is formed, just a change in appearance or state.

Answer:

We know matter has gone through a physical change when its form (state, shape, size, etc.) changes, but its chemical identity (the substance itself) remains unchanged (no new substance is created).