Question

which of the following is an example of a chemical change? a piece of bread being toasted blowing bubbles from a straw folding a piece of paper in half

Explanation:

A chemical change results in a new substance being formed. Toasting bread causes a chemical reaction in the bread's molecules, creating new compounds like melanoidins. Blowing bubbles and folding paper are physical changes as they only alter the physical form, not the chemical composition.

Answer:

a piece of bread being toasted