Jorge conducted an experiment, and included the graph shown below as part of his lab report.
TEMPERATURE CHANGES DURING
CHANGES OF STATE OF WATER
140
120
9 100
Temperature (C)
80
60
20
--20
0
20
80
100
Jorge's experiment involved which of the following?
A chemical change.
The formation of a new substance.
A change in the chemical properties of a substance.
A physical change.