Calculating Density Worksheet #3 Name ______Period _____

  1. What does density mean? (How would you explain it to someone who doesn’t know what it means so that they would understand?) ______
  1. Why is it said that density is a characteristic property of matter? What does that mean? ______
  1. How is density calculated? Write out the basic equation. ______
  1. Why is understanding density important? How does it apply to everyday life? (Think about how it might be important to know if something will sink or float.) ______
  1. What is the unit for solid density? g/____ What is the unit for fluid density? g/____
  1. A rock with a mass of 32 g and 43 cm3 has the density of ______? (Don’t forget to include units) Will this rock float or sink in water? ______
  1. A block measures 6cm by 3cm by 11cm. What is its volume? ______If it has a mass of 32 g what is its density? ______
  1. If you find a pure metal item outside, what’s one property of matter that you might use to identify it? ______
  1. If a piece of wood has a mass of 32g and measures 40 cm3 what is its density? (Don’t forget proper units)______
  1. If you find a gold colored ring and its density is 19.32g/cm3 and its mass is 46g what is its volume? (Don’t forget units)______
  1. If the mass of an unknown liquid is 900 g and its volume is 950 mL, what is the density? (Don’t forget proper units) ______
  1. If an unknown irregular solid has a mass of 64 g and when placed in a graduated cylinder with water, the water moves from 42 mL to 73 mL, what is the volume and density of the irregular solid? (Remember volume for solids is measured in cm3 even if the volume is found by water displacement). Volume ______Density ______
  1. If an unknown liquid has a mass of 54g and a volume of 32 mL, what is the density? ______(Use proper units)
  1. If someone asked you how to calculate density what would you tell them they need to know before they could do that? ______
  1. My friend has a block of an unknown solid on her desk. It’s a perfect cube, what tool will she use to find its volume? ______What will the unit for volume be in this case? ______
  1. A rectangular block of copper metal weighs 1896 g. The dimensions of the block are 8.4 cm by 5.5 cm by 4.6 cm. From this data, what is the density of copper? (hint: find the volume of the block first and don’t forget units)______
  1. A loaf of bread has a volume of 2270 cm3 and a mass of 454 g. What is the density of the bread? (Don’t forget proper units, I won’t remind you again). ______
  1. Use the data given below to calculate the density of each unknown substance. Then use the density chart given to determine the identity of each substance.

Mass (g) Volume (cm3) Density (g/cm3) Substance name

4725350 #28. ______

17115 #29. ______

14840 #30. ______

475250 #31. ______

6801000 #32. ______

Substance Name / Density in g/cm3
Gold / 19.3
Mercury / 13.5
Lead / 11.4
Iron / 7.87
Aluminum / 3.7
Bone / 1.7 – 2.0
Gasoline / 0.66 – 0.69
Air (Dry) / 0.00119