Question

change 1 is: impossible, a physical change, a chemical change; change 2 is: impossible, a physical change, a chemical change; change 3 is: impossible, a physical change, a chemical change

Explanation:

Step1: Analyze Change 1

The molecules change from individual units to groups. No new substances are formed, just a change in state or arrangement. This is a physical change.

Step2: Analyze Change 2

The molecules break apart and form new combinations. New substances are formed, so this is a chemical change.

Step3: Analyze Change 3

The molecules change from a more ordered to a more disordered state. No new substances are formed, just a change in arrangement. This is a physical change.

Answer:

Change 1 is: a physical change
Change 2 is: a chemical change
Change 3 is: a physical change