Changes of State
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Directions:
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Sqch aS: fne [-f,nq
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Write the word that best describes each process illustroted below.
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Directions: Usethe grophs below to answerthe questionsthotfollow.
d
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c
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o
E
oo
fi
g
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added-------+
Graph A
Heat
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'd
Heat
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6
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5. Which graph shows the melting of a crystalline solid?
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your reasoning.
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z
b.
o
o
o
6
o
c
6. What type of solid does the other graph show? Explain.
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26
StatesofMatter
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e
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o
i
i
I
t
1.
j
Matter
term in the blank at the left,
Column I
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t-'.
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Columrr
1. Thr is hard to pour
2. Energy from hot
because
it doesn,t flow
II
a. amorphous solid
easily.
cocoa melts a marshmallowplaced in it.
3. Like diamond, soot is made of carbon, but its atoms are
arranged in a random manner.
b. crystalline solid
c. freezing point
t(u
l(u
d. heat
l
-
:
5. Aluminum atoms
are arranged
in a repeating cubic pattern.
6. This sheet of paper is an arrangement of shaking pafticles.
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i
,
'' .'
i.:
-{'
I
7. A thermometer indirectly
measures the average kinetic
,nergy of particles.
8. Water
changes to ice at
9. The three physical
0oC.
states are
i
liquid, solid, and
10. A pin can float on the water in
e.
z,
G
matter
f. temperature
g. melting
ll=r
point
h. viscosity
EI
EI
a)
at
E
l. solid
gas.
j.
a cup.
surface tension
Directions: Answer the following questilns on the lines provided.
11. why does water fill the bottom of a glass, rather than cling to the sides?
c=
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=
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o
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12. v{hY do bea{q of water often form on a slippery surface, such as a freshly waxed car?
Dctr\ace *nSi cn cuLro
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i: O rtoso0 Q-v
13. What causes surface tension in water?
It4urcr
t4. Explain why certain bugs can walk on water.
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c
e Te nsirryr c wrr
L
tbu.t
15. When does water begin entering the gaseous state?
ti,
StatesofMatter 25