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Name________________ Class Hour_____ Density Worksheet 1

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Name________________ Class Hour_____ Density Worksheet 1 Powered By Docstoc
					                                                   Name________________
                                                          Class Hour_____
                             Density Worksheet

1. Define mass. Mass is the amount of matter in something. Mass is
measured with a scale or balance.



2. Define volume. Volume is how much space something takes up. It is
measured with a ruler or graduated cylinder.



3. Define density and show the formula for calculating density. Density is
how much mass is contained in a certain space. The formula for density is
D=m/v.



4. Why does changing the shape of an object have no effect on the density
of that object? Changing an object’s shape doesn’t change how much matter
is in it, nor does it change how much space it takes up; therefore it does not
change the density.



5. Aluminum is used to make airplanes. Cast iron is used to make weightlifting
equipment. Explain why the densities of these metals make them useful for
these purposes. Aluminum is not dense so you can use it to make big things
that don’t weigh a lot. Cast iron is very dense so you can use it to make small
things that weigh a lot.



6. What is the density of water? Remember for water 1g=1ml=1cm3
The density of water is 1 g/mL

7. Why does an air bubble rise to the surface of a glass of water? A bubble
rises to the top of a glass of water since it is less dense than the water.
8. Calculate the densities of the following objects. Remember to place units
after each number.
       Object A
              length = 6cm
              width = 3cm
              height = 1cm
              mass = 36g

      volume = 6x3x1 = 18 cm3          density = 36 g/18 cm3 = 2 g/cm3

      Object B
           length = 10cm
           width = 5cm
           height = 2cm
           mass = 300g

      volume = 10x5x2 = 100 cm3        density = 300 g/100 cm3 = 3 g/cm3

      Object C Use the water displacement method to determine the
      density of object C (silly putty).
            initial water level in graduated cylinder = 25ml
            final water level after placing silly putty in graduated cylinder =
            29ml
            mass of silly putty=8g

      volume = 29 mL -25mL = 4 mL      density = 8 g/4 mL = 2 g/mL

9. Which of the following materials will float on water (density 1 g/ml)?
      air = .001 g/cm3                 floats
      corn oil = .93 g/cm3             floats
      glycerine = 1.26 g/cm3           sinks
      corn syrup = 1.38 g/cm3          sinks
      wood = .85 g/cm3                 floats
      steel = 7.81 g/cm3               sinks
      rubber = 1.34 g/cm3              sinks
      ice = .92 g/cm3                  floats
      water = 1.00 g/cm3               mixes
10. Assuming the materials don’t mix, show how the materials in question
number 9 would "stack up" in a graduated cylinder.

Air
Wood
Ice
Corn oil
Water
Glycerin
Rubber
Corn syrup
Steel

				
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