Properties of Matter
Benchmark Review
1. What is the mathematical formula for density?
Mass divided by Volume
• 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
• 1/1=1
• 5/5=1
• 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.
• 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
• 5. What is a substance that dissolves in
water called?
• Solute
• 6. 2 ml of lead has a mass of 20g, what is
the density of lead?
• 20/2=10g/ml
• 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
• 12.993x10.49=136.3g
• 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
• 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
• 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
• 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
• 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.
• 13. What is the temperature at which a
solid changes into a liquid is known as?
• Freezing point
• 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
• 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.
• 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.
• 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.