Question

Select all that apply.

Based on the properties that change in a chemical reaction, which are examples of chemical changes?

baking a cake
burning firewood
leaf color from summer to fall
shredding paper

Answer 1

Burning a cake, burning firewood, leaf color from summer to fall.

Answer 2

Burning a cake, burning firewood, and leaf color from summer to fall.

Chemical changes are changes in the composition of a substance resulting from a chemical reaction

It changes from one substance into a new substance.

Shredding paper is a physical change because the paper is still paper. Even if you cut it, you are not changing the chemical composition of it.