What happens when copper and iron sulfate get mixed

The over all reaction will be, Fe+CuSO4>FeSO4 +Cu. The blue colour of copper sulphate will gradually disappear and at the end of the reaction, the solution will attain a pale green colour due to the formation of Ferrous ion

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.