States of Matter, Properties, and
Changes Study Guide Answers
1. Are these examples of physical or Chemical
Change?
a. burning paper. Chemical
b. baking cookies. Chemical
c. heating table sugar. Depends
d. dissolving salt in water. Physical
e. filtering. Physical
f. burning wood. Chemical
g. boiling water. Physical
h. crushing a can. Physical
i. gas burning on a stove. Chemical
j. rust forming on an iron fence. Chemical
k. salt dissolving in a glass of water. Physical
l. using electricity to break down water into hydrogen and
oxygen. Chemical
2. In the laboratory, how is the volume of a liquid usually
measured? Name the instrument. Displacement,
graduated cylinder
3. Anything that has mass and takes up space is called
___________________. Matter
4. How do liquid water, ice, and water vapor differ from
each other? Different states or phases of matter
5. Define Matter. Anything that has matter and takes up
space
6. How are the particles arranged in a solid, liquid, gas?
Explain and draw an example.
Solid = definite shape and volume, vibrates in place.
Liquid = No definite shape, definite volume, slips
and slides past, flows.
Gas = No definite shape or volume. Moves freely.
7. __________________ is the amount of
matter contained in an object. Mass
8. When an inflated balloon is exposed to cold
air, what happens?
a. the temperature inside the balloon rises.
b. the pressure inside the balloon rises.
c. the volume of the balloon decreases.
d. the volume of the balloon increases.
9. What happens during sublimation? Substance
changes from a solid to a gas.
10. The change from liquid to solid, or the reverse
of melting, is called _______________.
Freezing Point
11. According to the phase change diagram, the
freezing point of water is the same as its
_____________. Melting Point
12. How would you describe the process of
vaporization? A Change from liquid to gas.
13. An uncovered pot of soup is simmering on a
stove, and there are water droplets on the wall
above the back of the stove. What sequence can
you conclude has occurred?
a. melting, then boiling
b. freezing, then thawing
c. vaporization, then condensation
d. condensation, then vaporization
14. Stars and lightning are both examples of which
state of matter? Plasma
15. The amount of space that a gas takes up is its
_______________. Volume
16. If Density = Mass/Volume, what is the density of
a fishing sinker with a mass of 75g and a volume of
3cm3? 25 g/cm3
17. The tarnishing of metal is an example of a
____________________ change. Chemical
18.Dissolving a spoonful of sugar in tea or coffee is
an example of a ____________ change. Physical
19. Vapors coming off of dry ice at room
temperature is an example of_____________.
Sublimation
20. Be able to label the phase change diagram.
A. Freezing Point
B. Melting Point
C. Condensation
D. Boiling Point/
Vaporization
21.The standard unit of measure for mass in the
metric system is _____________. Grams
22. Be able to answer each choice below in complete sentences and in a
minimum of 1 paragraph.
a. Is the melting of an ice cube considered a physical change or a
chemical change? Explain your reasoning. Physical, change of state,
nothing new is made, easily reversable.
b. Compare solids, liquids, and gases in terms of shape and
volume. Solid = definite shape and volume.
Liquid = No definite shape, definite volume.
Gas = No definite shape or volume.
c. Suppose you buy some inflated party balloons that are at
room temperature (about 20°C). What will happen to those
balloons if you take them outside on a cold day? Explain. Pressure in
balloon will decrease as temperature decreases. Gas particles will lose
energy and move closer together. Volume of balloon will decrease.
d. Explain what happens to the water molecules in an ice cube when it
is removed from a freezer. Molecules absorb heat, gain energy, flow past
each other and become disorganized, Change from solid to liquid.
e. Is making ice cream the old fashioned way a
chemical or physical change? Explain your
reasoning. Physical, change of state, nothing new is
made, dissolving and freezing are physical changes.
22. What does the Law of Conservation of
Matter/Mass state? Give an example that proves
the law. Matter cannot be created or destroyed; it
only changes forms. Melting ice POE, frozen ice
cubes and melted ice cubes has the same mass
before and after the physical change. Alka-Seltzer
Tablet and Water POE, mass of the closed system
was the same before and after the chemical
change.
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