Question

Is crumpling a sheet of paper a physical or chemical change? Why?

Answer 1

physical change because even if you crumple the paper.

Answer 2

it's still a paper.

Answer 3

For it to be called a chemical reaction a new product must form. For example, breaking a rock makes the rock smaller changing it's physical appearance, but it is still a rock, nothing has changed.

Answer 4

@ZDoubleM correct.

Answer 5

@mikey69 btw a change in state is also a physical change. For example, ice (solid H2O) to water (liquid H2O) is a physical change and so is water to vapor (gaseous H2O).