Question

a student removes a loaf of bread hot from a oven the student cuts the bread and spreads the butter is it a physical or chemical change

Answer 1

it is a chemical change because you can't change it back.

Answer 2

This is a physical change because it affects the chemical substance but not the chemical composition. You are not changing the components of it, but it is still bread.
If they had let it burn, then it would be a chemical change.