Answers to the Physical Science Final Study Guide
Multiple Choice:
1. B
Short Answer:
2. A scientific theory is a possible explanation for a pattern observed
repeatedly in the natural world.
3. Hypotheses are based on observations, prior knowledge, or information
gathered during other experiments.
4. The investigator might have made an error during a single trial, or a
subject might perform differently each time.
5. A theory is more of an attempt to explain the pattern while a law is more
of a rule. Both stand until someone makes an observation that doesn’t
follow the theory or law.
6. Determine the pH. Acids are between 0 and 7 and bases are between 7
and 14.
7. 24 the law of conservation of mass states that the mass of products in a
chemical reaction is equal to the mass of reactants.
8. There is the same number of atoms of each element of the reactant side as
on the product side of the equation.
9. In homogeneous mixtures the components are mixed evenly throughout,
whereas parts of heterogeneous mixtures differ from other parts in
composition and are usually easy to distinguish.
True and False:
10.
11.
12.
13.
14.
F, Kelvin
T
F, two variables
T
F, electrons
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
T
T
T
F, a salt
F, a chemical
F, position
F, average
F, the same as
F, balanced
T
F, Unbalanced
F, 9.8m/s per second squared
T
F, speed up
F, a total
F, Potential
F, Potential
F, Thermal
T
F, nonrenewable
Completion:
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
table
circle
line
meter
SI
mass
atoms
heterogeneous
isotope
neutrons
mass, volume
condensation
melting point
movement
liquid, gas
Inertia
force
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
unbalanced
opposite
acceleration
third
rate
wheel and axle
fulcrum
compound machine
kinetic
warmer, cooler
conductor
Matching:
63.
64.
65.
66.
67.
D
B
A
E
C
68.
69.
70.
71.
D
A
C
B
72.
73.
74.
75.
76.
B
D
B
D
A
77.
78.
79.
80.
81.
82.
B
A
C
C
A
B
83. B
84. D
85.
86.
87.
88.
89.
90.
91.
92.
93.
94.
E
I
K
H
G
J
L
C
A
F
95. B
96. D
97. A
98. C
99. A
100. B