Name___________________________________________
Period_________________
Matter: Changes of State Test
#1-12. Fill in the table with the correct information.
Process
Evaporation
Change of State
Energy Added or Removed?
Condensation
Freezing
Melting
Deposition
Sublimation
#13-18. Draw how the particles of a solid, liquid and gas are arranged AND how they move.
Solid
Liquid
_____ 19. You can increase the amount of energy that a substance has by adding
________________ to it.
a.
b.
c.
d.
energy
heat
ice
more of the substance
Gas
_____ 20. Adding energy to a substance causes the molecules to:
a.
b.
c.
d.
move closer together and faster
move closer together and slower
move farther apart and faster
move farther apart and slower
True or False.
_____ 21. The melting and freezing points for all substances are at the same temperature.
_____ 22. The molecules in a gas contain the most energy.
_____ 23. The molecules of a liquid are more attracted than the molecules of a solid.
_____ 24. Energy transfers from a colder object to a warmer object.
25. As you drink a cold glass of water, you notice that small droplets of warm water begin to
form on the outside of your glass. What is the process called that caused the droplets to
form on your glass? Explain how the moisture formed on the glass.
26. As you are driving along on a cold morning, you notice that it starts to get foggy. Explain
how the fog formed.
27. You and your family decide that you want to make homemade ice cream. You mix up the
ingredients, which are very runny, and add them to the ice cream maker. Ice and salt are
added to help the ice cream mix freeze. After some time, you notice that the liquid ice
cream mix begins to harden. Explain what happened to the energy in the ice cream mix in
order for it to become a solid.
28. As part of your science fair project on plant growth, you need to measure 50 mL of water
for an experiment. Just as you measure that exact amount of water in your graduated
cylinder, your mother calls you to dinner. You quickly gather up your supplies and head
inside. In your rush, you accidentally leave the graduated cylinder of water outside.
Overnight, the temperature outside drops below freezing. In the morning, when you realize
that you forgot your graduated cylinder outside, you go and get it and notice that the water
level now reads 53 mL. Explain what happened to the molecules that caused the increase in
volume. Why is this unusual? (Think about how other liquids behave when they become a
solid.)
29. When working in the science lab, Bob accidentally drops the last bit of a powdered mixture
(a solid) that he is working with into a beaker of water. The powder quickly dissolves in the
water and Bob isn’t sure how to remove the powder from the water. Explain one way that
Bob can remove the powder from the water so that it can be used in his experiment.
30. Your mother has just finished washing a load of laundry and she asks your brother to take
the laundry outside to put on the clothes line. Your brother doesn’t want to stop watching
tv and help your mom, so he tells her that the humidity (the amount of water vapor in the
air) outside is too low for the clothes to dry. Instead, he suggests that she put the clothes
in the dryer and consider hanging the clothes outside to dry on a day when the humidity is
higher. Is this a good suggestion? Why or why not?
31. On a warm day, Jane’s family decided to hold a surprise pool party for her. The party
lasted into the night and when it began to get cold outside, the guests left. Since it was
late, Jane decided not to clean up until the next morning. When she went to clean up, she
noticed that the balloons that were outside had changed a lot since the day before. During
the party, the balloons were full and flying high. The next morning, she found the balloons
deflated and droopy. Jane inspected the balloons and didn’t see any holes. Explain what
happened to the molecules to cause this change. How could Jane get the balloons to inflate
again?