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Density (Grade 8)

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Density

1. 
Density is
  1. matter/solids
  2. volume/mass
  3. gas/liquid
  4. mass/volume
2. 
All of the following are acceptable units for density, EXCEPT:
  1. g/mL
  2. kg/L
  3. g/cc
  4. g/cm
3. 
Given the mass and density of an object, which equation should be used to calculate the volume of the object?
  1. [math]volume=(mass)/(density)[/math]
  2. [math]volume = (density)/(mass)[/math]
  3. [math]volume=mass + density[/math]
  4. [math]volume=density xx mass[/math]
4. 
If a black ball is denser than a white ball of the same size, the black ball has
  1. less volume
  2. more volume
  3. more matter taking up the same space
  4. less matter taking up the same space
5. 
What is the density of an object that has a mass of 184 g and a volume of 50 cm3?
  1. 9200 g / cm3
  2. 3.68 g / cm3
  3. .271 g / cm3
  4. 3.74 g / cm3
6. 
A rock with a volume of 4.0 cm3 and density of 3.0 g/cm3 has a mass of                
  1. 0.75 g
  2. 3.0 g
  3. 12.0 g
  4. 4.0 g
7. 
A geologist finds a rock and breaks it into two pieces to examine the crystals inside. The two pieces of the rock are then labeled Sample A and Sample B. Sample A is twice as large as Sample B. Which of the following statements is true?
  1. Sample A is denser than Sample B.
  2. Sample B is denser than Sample A.
  3. Sample A and Sample B have the same density.
  4. Sample A and Sample B are both less dense than the original rock.
8. 
What is more dense a bowling ball or a basketball? How do you know?



9. 
In science lab you are given the four substances listed below with their densities:

[math]Hon ey = 1.42 g//cm^3[/math]
[math]Olive oil = 0.90 g//cm^3[/math]
[math]Water = 1.00 g//cm^3[/math]
[math]Ethyl alcohol = 0.81 g//cm^3[/math]

You are asked to combine all four substances in a beaker and observe how they separate. List the order in which the four liquids separate, starting with the one on top to the one on the bottom of the beaker.



10. 
Your aunt brings you a gold bar from her visit to Egypt. It measures 10cm x 5 cm x 2 cm and has a mass of 1,930g. What is the density of the gold bar? (Show your work)







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