Procedure:

1. make sure the balance is tared (leveled out).

2. hang the rock from the bottom of the pan at one end

3. add enough masses in the opposite pan to balance the rock. record the mass of the rock in air in your report document.

4. place a beaker (glass) of water under the end of the balance so that the rock will hang in the water without touching the glass.

5. place enough masses on the pan to balance the rock as it hangs in the water. record the mass of the rock in water in your report document.

now calculate the specific gravity of the rock. the procedure is as follows:

7. record your final result in your report document. (repeat steps 4 - 7 five times and record your results in your report document.)