2. © 2006 Plano ISD, Plano, TX

4. (Like a rock) To measure the volume of an irregularly shaped object

5. © 2006 Plano ISD, Plano, TX 20 60 100 140 1. Get a graduated cylinder in which the irregular object will easily fit. 2. Pour water into the cylinder to a specific amount (in this example: to 80 mL). 80 mL 3. Record the volume of water.

6. © 2006 Plano ISD, Plano, TX 20 60 100 140 80 mL 4. Drop the object gently into the cylinder. 5. Record the new volume. 120 mL 6. Subtract the old volume from the new volume. 40 mL -or-

7. © 2006 Plano ISD, Plano, TX

8. a measurement of the amount of matter in an object. Rock Sponge Mass is defined as

9. © 2006 Plano ISD, Plano, TX That is, they take up about the same amount of space. Baseball and tennis balls have about the same volume.

10. © 2006 Plano ISD, Plano, TX But if you pick them up, you notice a difference. The baseball has more mass.

11. © 2006 Plano ISD, Plano, TX SilverAluminum A block of aluminum and a block of silver look very similar.

12. © 2006 Plano ISD, Plano, TX

13. PropertyAluminumSilver The Aluminum and Silver have properties in common and properties that make them different. 216 cm3 shiny poorgood solid silver 27108 AluminumSilver 1347 660ºC962ºC 2467ºC2162ºC Volume Luster Electrical conductor Heat Conductor Phase of matter Color Atomic Mass Kinds of Atoms Atomic Number Melting Point Boiling Point

14. © 2006 Plano ISD, Plano, TX One property that makes aluminum different from silver is the property of

15. © 2006 Plano ISD, Plano, TX Density is defined as the mass of a substance per unit of volume.

16. © 2006 Plano ISD, Plano, TX WoodPlasticMetal These three blocks have the same volume, but their masses are different.

17. © 2006 Plano ISD, Plano, TX Density = Mass/Volume or Mass = Density X Volume Volume = Mass/Density or Formula for Density

18. © 2006 Plano ISD, Plano, TX To Calculate Density 1. Determine the volume of the object. 2. Record the volume in mL. (1 mL = 1 cm 3 ) 3. Determine the mass of the object. 20 6060 100 14 0 80 mL 120 mL 40 mL 4. Divide mass by volume to determine density. (g/mL or g/cm 3 )

19. © 2006 Plano ISD, Plano, TX Density of Common Items

20. © 2006 Plano ISD, Plano, TX Let’s Practice! What is the density of a piece of iron that has a mass of 59.8g and a volume of 2.08 cm 3 ?

21. © 2006 Plano ISD, Plano, TX Granite has a density of 4.67 g/cm 3. What is the mass of 46.8 cm 3 of granite?

22. © 2006 Plano ISD, Plano, TX Copper has a density of 4.44 g/cm3. What is the volume of 2.78g of copper?

23. © 2006 Plano ISD, Plano, TX Corn oil has density of 6.89 g/cm 3. What is the mass of 34.0 cm3 of corn oil?

24. © 2006 Plano ISD, Plano, TX Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this information, calculate the density of mercury.

25. © 2006 Plano ISD, Plano, TX 28.5 g of iron shot is added to a graduated cylinder containing 45.50 mL of water. The water level rises to the 49.10 mL mark, From this information, calculate the density of iron.

26. © 2006 Plano ISD, Plano, TX Find the mass of 250.0 mL of benzene. The density of benzene is 0.8765 g/mL.