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Which of the following is an example of a physical change but not a chemical change?
A) The 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

Answer :

AL2006

A water pipe freezes and cracks on a cold night. (D)

There are three physical changes going on in this scenario:

1).  The air gets cold and dark at night.

2).  The water in the pipe freezes and expands.

3).  The pipe cracks.

There are no chemical changes in the description.

Answer:

A water pipe freezes and cracks on a cold night

Explanation:

A water pipe freezing and cracking is a physical change, not a chemical change. A physical change is a change in what the item looks like, feels like, or how the item has a different form. The water pipe freezing is an example of a physical change because the liquid water has turned to frozen water. The frozen water has expanded the pipe, causing it to crack. There are no chemical changes taking place in this scenario.

Mordancy.

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