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- Find and record the mass and volume of 3 different-sized steel balls to the nearest tenth. To get accurate measurements for the small steel ball, measure the mass and volume of 5 identical small steel balls and divide by 5.
- Find and record the mass and volume of 3 different-sized clay balls to the nearest tenth. Make your lumps of clay about the same size as each of the steel balls. Use the same lumps of clay to measure mass and volume. Measure the mass first to avoid soggy clay.
- Plot the data for each material on the same graph. Put Mass (M) on the vertical axis and Volume (V) on the horizontal axis. Scale your axes so that M goes up to at least 180 g and V goes up to at least 24 cc.
- What is the value of M when V is 0 cc? Put this point on your graph.
- Draw a best-fit line or curve to show the pattern of your points. Draw one for steel and a separate one for clay. Label each line or curve with the name of the material it represents.
