Question

identify all pictures that show a physical change

Explanation:

A physical change is a change in which the form or appearance of matter changes, but not its chemical composition. A paper - shredding machine (A) changes the physical form of paper by cutting it into smaller pieces without altering its chemical makeup. A hammer hitting a nail into wood (B) is a physical change as it only changes the position and shape of the nail and wood surface physically. A bruised pear (C) is also a physical change as it only affects the appearance of the pear's skin and flesh without changing its chemical identity at a fundamental level.

Answer:

A. The picture of the paper - shredding machine, B. The picture of the hammer hitting a nail, C. The picture of the bruised pear