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Graph your data on a sheet of Centimeter Graph Paper from the Student Activity Book.
- Label each axis and write in the units.
- The scale on the horizontal axis should go to 15 or more.
- The scale on the vertical axis should go to 40 or more.
- Plot your data points for both sizes of marbles on a single sheet of graph paper.
- When the number of marbles equals 0, what is the volume of the marbles? Add this point to your graph for both sets of data.
- If your points for the small marbles lie close to a line, use a ruler to draw a best-fit line.
- If your points for the large marbles lie close to a line, use a ruler to draw a best-fit line.
- Why does the water level rise when you add marbles to the graduated cylinder?
- Compare the line for the larger marbles to the line for the smaller marbles. How are they alike? How are they different?
- Use your graph to predict the volume of 7 small marbles. Show your work on your graph. Record your prediction.
- Check your prediction. Measure the volume of 7 small marbles. Record the volume.
- How close is your prediction to the measured volume? Is it within 1 or 2 cc?
- If your prediction was not close, you may need to correct your data on your graph before answering any more questions. Your teacher can help you decide.
