A student made the following observations. • The solution is lighter in color.

• The volume of solution is the same.

• The metal strip is shiny above the surface of the solution.

• The metal strip is not shiny below the surface of the solution.

• The metal strip below the surface of the solution has a dark coat of flaky material.

• When the metal strip is touched, the flaky material falls off.

Based on their observations, can the students correctly conclude that a chemical reaction occurred?

Yes, because a new material of a different color formed on part of the metal strip

No, because the solution stayed blue

No, because the metal strip was still visible

Yes, because the volume of the blue solution stayed the same