Grade 8 – Science Answer Key
Item
Number
Item Type
TEKS
Maximum
Number of
Points
Correct
Answer(s)
Reporting
Category
Readiness
and
Supporting
1
Multiple
Choice
3.8.9.B
1
A
3
Readiness
2
Multiple
Choice
2.8.6.C
1
D
2
Readiness
3
Short
Constructed
Response
1.8.5.D
2
See Appendix 1.1
1
Readiness
4
Multiple
Choice
3.8.7.A
1
C
3
Readiness
5
Multiple
Choice
4.8.11.A
1
B
4
Readiness
6
Multiple
Choice
3.8.10.C
1
D
3
Supporting
7
Multiple
Choice
3.8.9.C
1
D
3
Readiness
8
Multiple
Choice
3.8.7.B
1
C
3
Readiness
9
Multiple
Choice
1.8.5.A
1
D
1
Readiness
10
Multiple
Choice
4.7.10.C
1
A
4
Supporting
11
Multiple
Choice
2.6.8.D
1
B
2
Supporting
12
Multiple
Choice
4.7.14.C
1
B
4
Supporting
13
Drag and
Drop
3.8.8.A
2
Hot, bright,
Cool, bright, Hot,
dim, Cool, dim
See Appendix 1.2
3
Readiness
14
Multiple
Choice
2.6.9.C
1
C
2
Supporting
15
Multipart
1.8.5.B
2
C, C
1
Readiness
16
Drag and
Drop
1.8.5.C
2
metals, valence
electrons
See Appendix 1.3
1
Readiness
17
Multiple
Choice
3.8.9.B
1
A
3
Readiness
18
Multiple
Choice
4.8.11.B
1
C
4
Readiness
19
Text Entry
2.8.6.A
1
4 or 4.0
See Appendix 1.4
2
Readiness
20
Multiple
Choice
1.8.5.E
1
B
1
Readiness
21
Multiple
Choice
1.8.5.A
1
C
1
Readiness
22
Multiple
Choice
4.7.14.B
1
B
4
Supporting
23
Multiple
Choice
1.6.6.B
1
C
1
Supporting
24
Drag and
Drop
1.6.6.A
2
Metalloid, Nonmetal,
Metal, Metal, Metal
See Appendix 1.5
1
Supporting
25
Multipart
4.7.10.B
2
D, C
4
Supporting
26
Multiple
Choice
3.8.8.B
1
C
3
Supporting
27
Multiple
Choice
2.8.6.B
1
B
2
Supporting
28
Multiple
Choice
2.6.8.A
1
C
2
Supporting
29
Drag and
Drop
4.7.12.D
2
Provides energy for
cell functions,
Animal Cell, Storage
and transport of
molecules
See Appendix 1.6
4
Supporting
30
Multiple
Choice
2.8.6.A
1
C
2
Readiness
31
Multiple
Choice
3.8.7.B
1
B
3
Readiness
32
Short
Constructed
Response
2.8.6.C
2
See Appendix 1.7
2
Readiness
33
Multiple
Choice
1.8.5.E
1
B
1
Readiness
34
Multiple
Choice
3.8.7.A
1
A
3
Readiness
35
Multiple
Choice
4.7.12.B
1
C
4
Supporting
36
Multiple
Choice
1.8.5.B
1
A
1
Readiness
37
Multiple
Choice
2.6.8.C
1
A
2
Supporting
38
Multiple
Choice
4.8.11.A
1
B
4
Readiness
Grade 8 – Science
Appendix
1.1
The student’s response includes: The three elements represented in the formula are sodium (Na),
sulfur (S), and oxygen (O). There are 2 atoms of sodium, 1 atom of sulfur, and 4 atoms of oxygen
represented.
1.2
1.3
Sodium sulfate (Na
2
S0
4
)
is used to produce many products.
Which elemen
ts
are represented in the formula
AND
how many atoms
of
each element are
represented in the formula?
Read
the question carefully. Then
enter
your
answer in the
bo
x provided.
L
ab
el
th
e
charac
terist ics of stars in e
ach
area
of t
he
Hert
zspr
ung
-Russell di
ag
r
am
.
Move
ONE
co
rr
ec
t
an
s
we
r to
each
box.
Cool, bngh
II
Cool, dim
II
Hot, dim
II
Ho
,
bright
He
rtzsprung-Russell Diagram
. .
10
4
Super
g.
ian
tt
..
~.
··:
I •
li
VI
10
2
0
C
E
1
::J
...J
10-
2
-1
10
-4
2
5,000
10,000
6,000
3,000
Temperature (
K)
Complete
the
sentences
to
describe an
arrangement
in
the
periodic
table.
Move
the
correct
ans
w
er
to
each box.
Not
all answers will be used.
r
onrr
etals
!"'"'etas ...,.,t,,
oirk
v;a ence e ectrn.,c;
rieutrons
nrntnr
<;
All
the
el
ements
in
Group
2
of
the
periodic
table
are classified as :
metals
: . Each
element
in
Group
2 has few
er
valence
electrons
than
any
of
the
elements
in
Group
17
.
1.4
1.5
1.6
An unbalanced force
of
32
newtons Is shown acting on an
8.0-kl
logram object.
32 N to the east
8.0 kg
Based on
this
info
rmation, complete t he sentence to predict
the
motio
n
of
the object.
Ent
er
your
answer In
the
box. Your answer
must
be a whole number.
As long
as
the force acts on the
object,
the
object
wlll continue
to
m
ove
to
ward
the
east and I
ts
vel
ocity
will Increase
by
4.0 m/ s every second.
St
uden
ts
exa
mi
ned
the
prope
rt
ies of five di
ff
erent elements and recor
ded
ob
servat
ions about th
eir
pro
p
ert
ies in the
table. Based on the s
tu
dents' ob
serv
at
ions,
cl
assify each
sam
ple as a
me
tal, no
nme
tal,
or
me
ta
ll
oid.
Move the correct answer to each box.
Eac
h answer may be used
mor
e than once.
Prope
rt
ies
Sa
mp
le
1 2 3
4
5
Col
or
Blue-gray Yell
ow
Gray
Ye
l
low
Silver
M
or
e dense than water Yes Yes
Yes
Yes
No
Surf
ace appearance Shiny Dull Shiny Shiny Shiny
Ability
to
conduct
th
er
ma
l ener
gy
Average
Poo
r Excellent
Excellent Good
Ability
to
be stretched into w
ir
es
No
ne None Excellent Excell
en
t Excellent
Reaction
to
being hit with a h
amm
er Sh
atte
rs Sh
att
ers Bends
Be
nds Ben
ds
Ability to conduct ele
ctr
ici
ty
Som
et
imes Poor Excellent Excellent Excellent
Classifi
ca
tion
of
s
amp
le
[_ Met
al
loid_ i
!_Nonmetal
_!
[_
Me
tal_! [_ Metal
_!
[_
Metal_!
1.7
The student describes both the student’s push and friction as the forces affecting the block’s motion
before release. The student also identifies that these forces affect the block’s acceleration (or change
in velocity).
A
mode
l
of
a cell iis sho
wn
. Use t he
co
rr
ect
l
abe
ls
to
comp
l
ete
the
mode
l.
Move
the
co
rr
ect
answer
to
each
bo
x.
Not
all
ans
w
ers
wi
ll be
used
.
Animal Cell
Provides energy
for
cell
funct
ions
Plant Cell
Captures
energy
from
sunlight
Storage and
transport
of
molecules
Animal Cell
Storage
and
transport
of
mol
ecul
es
Controls
movement
of
ma
t
er
ials
into
and
out
of
cell
Provides energy
for
cell
functions
Controls cell
act1vit1es
A
1.5
-kllogram block Is pushed rapidly and released. The block c
ont
inues to sli
de
some distan
ce
until
It
comes to a
stop. The fi
gure
shows t
he
block a
ft
er
it
has been released and
befor
e it comes to a sto
p.
fl
,---
--,
~ I I
, '
N
ame
the forces th
at
d
ir
ect
ly affect
the
block's
motio
n
both
before and
af
ter
t
he
block has been released. Describe
the
ef
fects
of
each
fo
rce na
me
d.
Enter your a
nsw
er
in
th
e box.
