Question

Pls help ASAP........ A student was roasting marshmallows over a fire. The student

noticed that the marshmallows turned brown, and they were
bubbling. Is this a chemical or physical change to matter? How do
you know? List two signs that you know what type of change it is.

Answer 1

A chemical change

Step-by-step explanation:

The marshmallow turning brown and bubbling implies that a chemical change has taken place.

For chemical changes to occur, we observe any of the following:

• a new kind of matter is formed.
• it is always accompanied by energy changes
• the process is not easily reversible
• it involves a change in mass
• requires considerable amount of energy.

ii. Two signs that shows a chemical change has taken place is that:

• bubbles are being formed as it is roasted and it implies that new substances have been formed.
• also, significant amount of heat energy is supplied for the roasting.