Mark is chopping up a tree into small pieces. He feels that he is causing a physical change. Why is he correct?

Question

Responses

AThe tree is a different type of species now.
The tree is a different type of species now.
BThe chemical identity of the tree has not been changed.
The chemical identity of the tree has not been changed.
CThe tree lost cells when it was cut up.
The tree lost cells when it was cut up.
DThe tree has a new chemical identity.

Answer 1

Mark is correct in thinking he is causing a physical change because:

B. The chemical identity of the tree has not been changed.

When Mark chops the tree into small pieces, he alters its physical state and size, but the chemical composition of the wood remains the same. This is characteristic of physical changes, where the substance itself does not change chemically.