Example Items
Science 8
Science 8 Example Items are a representative set of items for
the ACP. Teachers may use this set of items along with the test blueprint as guides
to prepare students for the ACP. On the last page, the correct answer, content SE
and SE justification are listed for each item.
The specific part of an SE that an Example Item measures is NOT necessarily
the only part of the SE that is assessed on the ACP. None of these Example Items
will appear on the ACP.
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First Semester
2017–2018
Code #: 3081
STAAR GRADE 8 SCIENCE
REFERENCE MATERIALS
STAAR
TM
State of Texas
Assessments of
Academic Readiness
FORMULAS
Density =
mass
volume
Average speed =
total distance
total time
Net force = (mass)(acceleration)
Work = (force)(distance)
D =
m
V
s =
d
t
F = ma
W = Fd
7
6
5
4
3
2
1
4
Hydrogen
3
12
11
(262)
(267)
7
7B
Actinide Series
Lanthanide Series
140.908
231.036
Protactinium
232.038
Thorium
(227)
Actinium
91
Pa
Ac
Re
144.242
60
Nd
Bohrium
(272)
Bh
107
Rhenium
186.207
75
(145)
61
Pm
Hassium
(270)
Hs
108
Osmium
Os
190.23
76
Ruthenium
101.07
44
Ru
Iron
55.845
Fe
26
8
Silicon
28.086
Si
Uranium
238.029
U
92
Neptunium
(237)
93
Np
Praseodymium Neodymium Promethium
Th
90
Cerium
Lanthanum
89
140.116
La
138.905
59
58
Pr
(271)
Seaborgium
(268)
Sg
Dubnium
Db
Tungsten
Tantalum
106
W
183.84
74
Ta
105
(98)
43
Tc
Manganese
54.938
Mn
25
Molybdenum Technetium
95.96
42
Mo
Chromium
51.996
Cr
24
6
6B
Atomic mass
Symbol
180.948
73
Niobium
92.906
41
Nb
Vanadium
50.942
V
23
5
5B
Ce
57
Lawrencium Rutherfordium
(226)
Radium
104
Rf
Hafnium
103
(223)
Fr
Hf
178.49
Lutetium
Francium
88
87
Lr
Barium
Cesium
174.967
Lu
72
71
Ra
Ba
137.328
Cs
132.905
56
55
Zirconium
91.224
40
Zr
Yttrium
88.906
87.62
Strontium
85.468
Rubidium
Y
39
Sr
38
Rb
37
47.867
Titanium
44.956
Scandium
40.078
Calcium
39.098
Potassium
22
Ti
21
4
4B
Sc
19
3
3B
Ca
20
Sodium
K
24.305
Magnesium
22.990
Mg
Beryllium
Lithium
Na
Be
9.012
Li
6.941
1.008
2
2A
H
Name
10
11
1B
12
2B
13
3A
14
4A
15
5A
16
6A
17
7A
(281)
Ds
110
Platinum
Pt
195.085
78
Palladium
106.42
46
Pd
Nickel
58.693
Ni
28
Au
(280)
Rg
111
Gold
196.967
79
Silver
107.868
47
Ag
Copper
63.546
Cu
29
Plutonium
(244)
94
Pu
Samarium
150.36
62
Sm
(247)
Curium
(243)
96
Cm
Americium
95
Am
157.25
Gadolinium
151.964
64
Gd
Europium
63
Eu
Meitnerium Darmstadtium Roentgenium
(276)
Mt
109
Iridium
Ir
192.217
77
Rhodium
102.906
45
Rh
Cobalt
58.933
Co
27
9
8B
Hg
Tl
Thallium
204.383
81
Indium
114.818
49
In
Gallium
69.723
Ga
31
Aluminum
26.982
Al
13
Boron
C
Pb
Lead
207.2
82
Tin
118.711
50
Sn
Germanium
72.64
Ge
32
Silicon
28.086
Si
14
Carbon
12.011
6
N
Bi
Bismuth
208.980
83
Antimony
121.760
51
Sb
Arsenic
74.922
As
33
30.974
Phosphorus
P
15
Nitrogen
14.007
7
Berkelium
(247)
97
Bk
Terbium
158.925
65
Tb
Californium
(251)
98
Cf
Dysprosium
162.500
66
Dy
Einsteinium
(252)
99
Es
Holmium
164.930
67
Ho
Fermium
(257)
100
Fm
Erbium
167.259
68
Er
Mass numbers in parentheses are those of
the most stable or most common isotope.
Mercury
200.59
80
Cadmium
112.412
48
Cd
Zinc
65.38
Zn
30
B
10.812
5
O
Po
F
At
Nobelium
(259)
102
No
Ytterbium
173.055
70
Yb
Astatine
(210)
85
Iodine
126.904
I
53
Bromine
79.904
Br
35
Chlorine
35.453
Cl
17
Fluorine
18.998
9
Updated Spring 2011
Mendelevium
(258)
101
Md
Thulium
168.934
69
Tm
Polonium
(209)
84
Tellurium
127.60
52
Te
Selenium
78.96
Se
34
Sulfur
32.066
S
16
Oxygen
15.999
8
Ne
Rn
Radon
(222)
86
Xenon
131.294
54
Xe
Krypton
83.798
36
Kr
Argon
39.948
18
Ar
Neon
20.180
10
Helium
4.003
He
2
14
1
Atomic number
18
8A
1
1A
PERIODIC TABLE OF THE ELEMENTS
STAAR GRADE 8 SCIENCE
REFERENCE MATERIALS
EXAMPLE ITEMS Science 8, Sem 1
1
2
3
The reaction NH3  O2  NO  H2O is considered unbalanced because there are —
A
more oxygen atoms on the reactant side of the equation than on the product side of the
equation
B
less nitrogen atoms on the reactant side of the equation than on the product side of the
equation
C
more hydrogen atoms on the reactant side of the equation than on the product side of the
equation
D
unequal numbers of all atoms on the reactant and product sides of the equation
When George flies his model airplane, he wants to know how fast and the direction it is flying.
What does he calculate to tell him both?
A
Acceleration
B
Distance
C
Speed
D
Velocity
The properties of an unknown element are listed.
Reactivity
Electrical Conductivity
Malleability
Very High
Very Good
Good
Based on these properties, the element is expected to be listed in which group on the Periodic
Table?
A
1
B
16
C
17
D
18
Dallas ISD - Example Items
EXAMPLE ITEMS Science 8, Sem 1
Use the picture to answer the next question.
4
5
How many protons are present in the oxygen atom?
A
24
B
16
C
8
D
4
In a crash test demonstration, a car with a bowling ball inside hits a brick wall. The bowling ball
then flies out of the car because it is not restrained. Which statement best describes why this
happens?
A
An object will remain at rest or move in a straight line unless it is acted upon by another
force.
B
An object acted upon by an unbalanced force will accelerate in the direction of the force.
C
An object will resist motion if the surfaces of the two objects resist each other.
D
For every action, there is an equal but opposite reaction.
Dallas ISD - Example Items
EXAMPLE ITEMS Science 8, Sem 1
6
Which table matches the subatomic particles with the region of an atom in which they are
located?
A
B
C
D
7
Subatomic Particles
Location in Atom
Protons and Electrons
Nucleus
Neutrons
Surrounding nucleus
Subatomic Particles
Location in Atom
Electrons and Neutrons
Nucleus
Protons
Surrounding nucleus
Subatomic Particles
Location in Atom
Protons and Neutrons
Nucleus
Electrons
Surrounding nucleus
Subatomic Particles
Location in Atom
Electrons
Nucleus
Protons and Neutrons
Surrounding nucleus
The picture shows a divergent boundary between two continental landmasses.
Faults
Tectonic
plates
moving away
from each
other
Mantle
Continental
Crust
What crustal formation results from this motion?
A
Folded mountain
B
Rift valley
C
Trench
D
Surface volcano
Dallas ISD - Example Items
Magma
EXAMPLE ITEMS Science 8, Sem 1
Use the table to answer the next question.
8
9
Common Name
Chemical Formula
Hydrogen peroxide
2H2O2
Vinegar
CH3CO2H
Glucose
C6H12O6
Iron oxide
3 Fe2O3
Which chemical has nine atoms of oxygen?
A
Hydrogen peroxide
B
Vinegar
C
Glucose
D
Iron oxide
Students added white tablets to the cup of water.
Before
After
Which statement indicates that a chemical change occurred?
A
Gas bubbles formed.
B
The tablets dissolved.
C
The density of the tablets decreased.
D
The volume of the water decreased.
Dallas ISD - Example Items
EXAMPLE ITEMS Science 8, Sem 1
10
11
Which statement provides the best evidence that the Earth’s continents are in very different
positions today than they were millions of years ago?
A
Glaciers form valleys between mountains.
B
Volcanoes surround most of the Pacific Ocean.
C
Polar bears have become an endangered species.
D
Fossils of tropical plants have been found in Antarctica.
Students were given the topographic map.
An approximate elevation for Point Z is —
A
100 m
B
200 m
C
220 m
D
300 m
Dallas ISD - Example Items
EXAMPLE ITEMS Science 8, Sem 1
Use the diagram to answer the next question.
12
What is the net force in newtons on the cylinder?
Record the answer and fill in the bubbles on
the grid provided. Be sure to use the
correct place value.
13
Which scenario includes a description of velocity?
A
Two skateboarders racing on a fifteen meter ramp
B
Two skateboarders traveling north at the same speed
C
Two skateboarders traveling at a constant speed
D
Two skateboarders waiting at a starting line
Dallas ISD - Example Items
EXAMPLE ITEMS Science 8, Sem 1
Use the table to answer the next question.
Chemical Equations
14
15
I
3Fe  H2O  Fe3O4  H2
II
C2H6  3O2  2CO2  3H2O
III
2Zn  SO2  2ZnO  S
Which equations do not follow the law of conservation of mass?
A
I and II
B
I, II, and III
C
I and III
D
II and III
A man pulled a cart filled with stones that had a total mass of 60kg.
He increased the amount of force used to pull the cart from 60N to 90N, what is the new
acceleration of the cart?
A
2.5 m/s2
B
1.5 m/s2
C
1 m/s2
D
0.5 m/s2
Dallas ISD - Example Items
EXAMPLE ITEMS Science 8 Key, Sem 1
Item#
Key
SE
Process Skills
SE Justification
1
C
8.5F
--
Recognize whether a chemical equation containing
coefficients is balanced or not and how that relates
to the law of conservation of mass.
2
D
8.6B
--
Differentiate between speed, velocity, and
acceleration.
3
A
8.5C
8.2E
Interpret the arrangement of the Periodic Table,
including groups, to explain how properties are used
to classify elements.
4
C
8.5B
8.3B
Identify that protons determine an element's
identity and valence electrons determine its
chemical properties, including reactivity.
5
A
8.6C
--
Investigate and describe applications of Newton's
law of inertia, law of force and acceleration, and law
of action reaction such as in vehicle restraints.
Describe the structure of atoms, including the
masses, electrical charges, and locations, of protons
and neutrons in the nucleus and electrons in the
electron cloud.
6
C
8.5A
--
7
B
8.9B
8.3B
Relate plate tectonics to the formation of crustal
features.
Recognize that chemical formulas are used to
identify substances and determine the number of
atoms of each element in chemical formulas
containing subscripts.
8
D
8.5D
8.2E
9
A
8.5E
--
Investigate how evidence of chemical reactions
indicate that new substances with different
properties are formed.
10
D
8.9A
--
Describe the historical development of evidence that
supports plate tectonic theory.
11
C
8.9C
8.3B
12
5
8.6A
--
Calculate how unbalanced forces change the
direction of an object's motion.
13
B
8.6B
--
Differentiate between velocity and acceleration
14
A
8.5F
--
Recognize whether a chemical equation containing
coefficients is balanced or not and how that relates
to the law of conservation of mass
15
B
8.6A
--
Demonstrate and calculate how unbalanced forces
change the speed of an object's motion
Interpret topographic maps and satellite views to
identify land features.