© 2006 Plano ISD, Plano, TX

Volume is the amount of space occupied by an object

© 2006 Plano ISD, Plano, TX

(like a brick) To know the volume of a solid rectangular prism

© 2006 Plano ISD, Plano, TX 1. Measure the dimensions of the rectangular prism. Length Width Height

© 2006 Plano ISD, Plano, TX Length Width Height

© 2006 Plano ISD, Plano, TX 2. Multiply the three dimensions and their units together. Length X Width X Height = Volume

© 2006 Plano ISD, Plano, TX For the brick, the units are centimeters (cm). Therefore, the units for volume are expressed in cubic centimeters or cm 3. Therefore, the units for volume are expressed in cubic centimeters or cm 3.

© 2006 Plano ISD, Plano, TX To find out how much a truck or box car will hold, measure the dimensions using larger units - meters. Therefore, the volume is expressed in cubic meters, m 3.

© 2006 Plano ISD, Plano, TX

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

© 2006 Plano ISD, Plano, TX Get a graduated cylinder in which the irregular object will easily fit. 2. Pour water into the cylinder to half the total volume the cylinder can hold. 80 mL 3. Record the volume of water.

© 2006 Plano ISD, Plano, TX 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-

© 2006 Plano ISD, Plano, TX 1. Securely tie a string around the rock mL 2. Record the volume of water.

© 2006 Plano ISD, Plano, TX 3. Carefully sink the object into the cylinder until it is completely covered with water Record the volume Subtract the original volume from the new volume. 6. Express the volume in mL.

© 2006 Plano ISD, Plano, TX

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

© 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.

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

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

© 2006 Plano ISD, Plano, TX

PropertyAluminumSilver The Aluminum and Silver have properties in common and properties that make them different. 216 cm 3 shiny poorgood solid silver AluminumSilver ºC962ºC 2467ºC2162ºC Volume Luster Electrical conductor Heat Conductor Phase of matter Color Atomic Mass Kinds of Atoms Atomic Number Melting Point Boiling Point

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

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

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

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

© 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 mL 120 mL 40 mL -or- Width XHeightLength X 4. Divide mass by volume to determine density. (g/mL or g/cm 3 )

© 2006 Plano ISD, Plano, TX Density of Common Items Remember: 1 mL = 1cm 3

© 2006 Plano ISD, Plano, TX Let’s Practice! What is the density of a piece of iron that has a mass of 60 g and a volume of 2.0 cm 3 ?

© 2006 Plano ISD, Plano, TX Granite has a density of 4.0 g/cm 3. What is the mass of 40 cm 3 of granite?

© 2006 Plano ISD, Plano, TX Copper has a density of 4.0 g/cm 3. What is the volume of 12.0 g of copper?

© 2006 Plano ISD, Plano, TX Corn oil has density of 7.0 g/cm 3. What is the mass of 34.0 cm 3 of corn oil?

© 2006 Plano ISD, Plano, TX Mercury metal is poured into a graduated cylinder that holds exactly 20.0 mL. The mercury used to fill the cylinder weighs g. From this information, calculate the density of mercury.

© 2006 Plano ISD, Plano, TX 28.0 g of iron shot is added to a graduated cylinder containing mL of water. The water level rises to the mL mark, From this information, calculate the density of iron.

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