Properties of Matter

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Properties of Matter

• Benchmark Review

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1. What is the mathematical formula for density?
Mass divided by Volume
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• 2. Object X has a mass of 1g and a volume of
  1ml.  Object Y has a mass of 5g and a volume of
  5ml.  Which object has a greater density?
• They both have the same
• 1/11
• 5/51

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• 3. Explain what elements make table salt?
• The elements sodium and chlorine are chemically
  combined to create table salt. One sodium atom is
  combined with one chlorine atom.

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• 4. Explain what elements make water?
• Hydrogen and oxygen are chemically combined to
  form water. Two hydrogen atoms are combined with
  a single oxygen atom

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• 5. What is a substance that dissolves in water
  called? 
• Solute

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• 6. 2 ml of lead has a mass of 20g, what is the
  density of lead?
• 20/210g/ml

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• 7. The density of silver is 10.49 g/cm3.  If a
  sample of pure silver has a volume of 12.993 cm3,
  what would the mass?
• Mass volume x density
• 12.993x10.49136.3g

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• 8. Pure gold has a density of 19.32 g/cm3.  How
  large would a piece of gold be if it had a mass
  of 318.97 g?
• Volume mass/density
• 318.97/19.32 18.96cm3

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• 9. The density of lead is 11.342 g/mL.  What
  would be the volume of a 200.0 g sample of this
  metal?
• Volume mass/density
• 200/11.342 17.63ml

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• 10. The mass of a toy spoon is 7.5 grams, and its
  volume is 3.2 ml.  What is the density of the toy
  spoon?
• Mass/volume
• 7.5/3.2 2.3g/ml

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• 11. A mechanical pencil has the density of 3
  grams per cubic centimeter.  The volume of the
  pencil is 15.8 cubic centimeters. What is the
  mass of the pencil?
• Mass volume X density
• 15.8x3 47.4g

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• 12. Can you easily separate a solution by
  filtration? Explain.
• You cannot easily separate a solution by
  filtration. The solute is dissolved. You have to
  evaporate out the solvent.

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• 13. What is the temperature at which a solid
  changes into a liquid is known as?
• Freezing point

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• Label the following as Chemical or Physical
  Change. (remember Chemical cannot be changed
  back)
• 14. Water being frozen into ice cubes P
• 15. Water vapor rising from the surface of a hot
  drink P
• 16. Paper being crumpled into a ball P
• 17. Smoke coming from an automobile exhaust pipe C

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• 18. Adam wants to know if red or green apples
  turn brown faster when exposed to air. He slices
  one red apple and one green apple in half. He
  leaves the exposed surfaces facing upward. After
  ten minutes, he records the observations shown in
  the chart below.
• What should Adam's next step be?
• Adam should complete more trials. He should check
  the apple more often to look for a change sooner.

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• 19. An iron door handle on an outdoor shed has
  reacted with oxygen from the atmosphere. Which of
  these observations indicates that a reaction has
  occurred?
• The handle is covered with scratches.
• The handle is spotted with rust.
• The handle is bent out of shape.
• The handle is cool to the touch.

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• 20. Explain how you could separate the salt out
  of the saltwater mixture?
• You have to either let all of the water evaporate
  out or you can boil the water until all has
  boiled out and you have only salt remaining.

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