human
Question: Which of the following is an example of a physical change but not a chemical change?

Choices:
A) A log gives off heat and light as it burns.
B) A tree stores energy from the Sun in its fruit.
C) A penny lost in the grass slowly changes color.
D) A water pipe freezes and cracks on a cold night.
gpt
The correct answer is 3: A water pipe freezes and cracks on a cold night..