Question

Beating an egg, butter melting on a hot day, what do they have in common?

A) Both are chemical reactions.
B) Both are physical changes.
C) Both involve a change of state.
D) Both involve the application of heat.

Answer 1

Both beating an egg and butter melting are physical changes because the substances involved retain their original identity despite changes in form or state.

Step-by-step explanation:

The commonality between beating an egg and butter melting on a hot day is that both processes are physical changes. A physical change is where the composition of the matter remains unchanged even though the form may change. For instance, when butter melts, it changes from a solid to a liquid, but its chemical identity as butter doesn't change, much like water turning into steam or ice melting.

Beating an egg involves changing its structure but not its chemical makeup. Beating simply rearranges its parts, which can be considered a physical change because the egg itself remains an egg before and after beating. Therefore, the correct answer to the student's question is B) Both are physical changes.