Question

Mario places 10 mL of water in a test tube and heats the liquid over a Bunsen burner for 2 minutes. After removing the test tube from the Bunsen burner, there are 6 mL of water left in the test tube. This experiment is a good example of a
A.
physical change involving phase changes.
B.
chemical change involving chemical reactions.
C.
chemical change involving phase changes.
D.
physical change involving chemical reactions.

Answer 1

The experiment described involves heating water, which results in some of it evaporating. The remaining liquid water indicates that this is a physical process (specifically a phase change from liquid to gas) rather than a chemical change (which would involve the formation of new substances).

Therefore, the correct option is:

**A. physical change involving phase changes.**