' volume of oil

14. To find the mass of water, subtract the mass of the empty cup from the mass of the cup and the water together.

15. To find the density of the water, divide the mass of the water by the volume of the water, as shown in the equation below:

mass of water

' volume of water 3

16. Combine the oil and water in the clear cup, and record your observations in your lab report.

17. Jfc^ iJi Clean up your materials, and wash your ^^ hands before leaving the lab.

Analysis and Conclusions

1. Graph the data you collected in Part A. Plot time on the x-axis and temperature on the y-axis.

2. Based on your data from Part A, what is the relationship between color and heat absorption?

3. How might the color of the clothes you wear affect how warm you are on a sunny 90° day?

4. In Part B, what did you observe when you combined the oil and water in the clear cup? Relate your observation to the densities that you calculated.

5. What could you infer about the value for the density of ice if you observe it to float in water?

6. How would your calculated values for density be affected if you misread the volume measurement on the graduated cylinder?

Further Inquiry

Pumice is a volcanic rock that has a density less than

1.00 g/cm3. How would you prove this if you did not have a balance to weigh the pumice? (Hint: The density of water is 1.00 g/cm3.)

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