Question

While camping, you accidentally burn your marshmallows. Is this a physical or chemical change? How can you tell?

Answer 1

Burning is always a chemical reaction. It can be proved as a black substance is formed, which alters the chemical composition of the substance

Answer 2

According to the question;

"If you accidentally burn your marshmallows."

It will be a chemical change because every kind of burning or combustion is a chemical reaction itself with the presence of the atmospheric oxygen.

The burned marshmallow's black residual substance is also a chemical substance.

That's why it is a chemical change.