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8th Science STAAR Review 2025 Flashcards | StudBud
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8th Science STAAR Review 2025
8th Science STAAR Review 2025
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1
Which of the following chemical equations is correctly balanced?
C
D
A
B
2
If equal forces are applied to a marble and bowling ball, which has more acceleration?
The marble
The have the same acceleration
The bowling ball
Neither accelerate
3
Which has more acceleration? A car going from 50-60 or a bike going from 0-10 in the same time?
Not enough information
Car
Bike
Same
4
As potential energy decreases, kinetic energy...
Decreases
Stays the Same
Increases
5
If pushing 2 shopping carts both with equal strength, which has more acceleration?
The one with three times more mass
The empty one
The one that is full twice as much
6
An example of a variation of traits found in birds are-
having two eyes
having a long beak
having two wings
having two legs
7
Which law says a bigger mass needs a larger force to make an object move?
Ninth
Second
Third
First
8
Why is biodiversity important to ecosystems like forests, oceans, or even cities?
It helps people grow more crops.
It ensures all species can support each other.
It makes the area more attractive to tourists.
It speeds up the growth of trees.
9
During which moon phases do neap tides happen?
waxing and waning crescents
New and full moon
1st and 3rd quarter
waxing and waning gibbous
10
Solve for FORCE. Mass = 8kg . Acceleration = 2 m/s
2
Force = 16 Newtons
Force = 6 Newtons
Force = 4 Newtons
Force = 10 Newtons
11
How do convection currents affect weather?
creates fog
creates snow
creates rain
creates wind
12
Solve: mass is 82kg. Acceleration is 2 m/s2. What is the force?
164 N
84 N
80 N
41 N
13
Evidence of chemical reactions
Changing ordor
Changing color
Releasing light
Giving off heat
14
Santa's sleigh travelled 300 metres in 2 seconds. Calculate its speed.
150m/s
0.15mph
0.15m/s
150mph
15
Calculate speed...
2 m / s
1 m / s
10 m / s
20 m / s
16
Which body systems circulates blood throughout the body?
digestive system
skeletal system
nervous system
circulatory system
17
How is an energy pyramid organized?
By roman numerals
by niche
By Trophic Levels
by population size
18
Motion Graphs
C
B
D
A
19
Which diagram shows when Neap Tides occur?
A
B
20
Where are the super giants found on the HR Diagram?
Bottom
Right
Left
Top
21
As energy moves through the pyramid, the amount of available energy..
increases as the size of the organism increases
doubles as it moves up each trophic level
decreases because it is released as heat in the environment
remains the same as it is transferred to the next level
22
What are genes within chromosomes made of?
DBS
HGV
DNA
ABV
23
As potential energy decreases, kinetic energy_______.
Decreases
Increases
Is destroyed
Stays the same
24
Which types of changes observe the law of conservation of mass?
Only chemical changes
Only changes of state
Only physical changes
Physical changes and chemical changes
25
The frog is the _____________ in this energy pyramid.
herbivore
secondary consumer
primary consumer
tertiary consumer
26
How does biodiversity affect an ecosystem?
only affects abiotic factors
doesn't support variety
contributes to sustainability
limited interrelationships
27
Which of the following is not an evidence of chemical reactions?
Temperature change
Same substance
Production of light
Evolution of Gas
28
Calculate the net force.
6 N to the left
2 N to the right
6 N to the right
2 N to the left
29
Solve for mass
if Force=
6
N acceleration =
12
m/s
2
mass =
?
2 Newtons
. 5 kg
72 kg
2 kg
30
Potential or Kinetic?
Kinetic
Potential
31
Calculate the net force.
1000 N to the left
Zero
1000 N to the right
2000 N to the left
32
Is Boron a metal, nonmetal, or metalloid?
Metalloid
Metal
Nonmetal
33
Spring tides
are the same height all year long
have not very high high tides and not very low low tides
have very high high tides and very low low tides.
34
Which diagram shows when Spring Tides occur?
B
A
35
Plate Tectonics
J
H
F
G
36
At convergent boundaries, plate tectonics ______?
Spread apart
Slip past each other
Stay still
Collide
37
Which is an example of where primary succession could occur?
a corn field is abandoned and left to overgrow
natural fire burns a prarie
flood covers a piece of land
a glacier melts and exposes new rocks
38
Which level of the energy pyramid has the most energy?
decomposers
producers
apex predators
consumers
39
Chemical equations
describe only biological changes
give directions for naming chemical compounds
show how to write chemical formulas
describe chemical reactions
40
In comparison the our Sun, the star
Sirius
is
hotter and less luminous
cooler and more luminous.
cooler and less luminous
hotter and more luminous.
41
What powers convections currents weather they're in the mantle of the earth or anywhere else?
heat
cold
Electricity
volume
42
Which is an example of Newton's 2nd law?
A fan spinning
Sneezing
Pushing a 10 pound box with a 6 newton force
A ball bouncing
43
Explain the movement of convection currents in the air.
heated air is more dense and sinks. Cooler air is less dense
Cooler air is more dense and rises. Heated air is less dense
Cooler air is less dense and sinks. Heated air is more dense
Heated air is less dense and rises. Cooler air is more dense
44
Which Law of Motion is also called the Law of Inertia?
3rd Law
2nd Law
1st Law
45
The final stage of ecological succession in a land ecosystem is a ________.
Climax community
Primary succession
Pioneer species
Secondary succession
46
Beating a drum involves this energy transformation
thermal to sound
motion to sound energy
electric to mechanical energy
chemical to gravitational
47
Neap tides are?
low tides
weak tides
fast tides
strong tides
48
Which has more acceleration: Ball A F= 160 N, M = 10 kg or Ball B F = 1 N, M = 40 g
Ball A by about 1 m/s/s
Ball A by about 10 m/s/s
Ball B by about 1 m/s/s
Ball B by about 10 m/s/s
49
motion graphs
c
a
d
e
50
Which Law of Motion gives us a way to calculate Force?
2nd Law
3rd Law
1st Law
51
Which describes the seasons as shown at point B in the diagram?
winter
fall
summer
spring
52
How much force does an object with a mass of 5 kilograms that is accelerating at 10 m/s/s have?
15 N
50 N
50 kg
2 N
53
How can groundwater become polluted?
People throwing trash on the ground.
Oil spills in the ocean.
Pollutants on the ground seeping through the soil.
Atmospheric deposition.
54
During which moon phases do spring tides occur?
new and full moon
waxing and waning crescents
waxing and waning gibbous
1st and 3rd quarter
55
Convection currents in the mantle are caused by differences in what?
Mass
Size
Composition
Temperature and Density
56
Motion graphs
A
D
C
B
57
What kind of weather can we predict in Atlanta in the next day or two?
Warm and Thunderstorms
Warm and Clear
Cold and Partly cloudly
Cold and Thunderstorms
58
_________ + __________ = cause of seasons
tilt + revolution
light + temperature
solstices + equinoxes
rotation + tilt
59
What Energy Transformation takes place in a flashlight?
Nuclear → Electrical → Radiant
Chemical → Electrical → Radiant
Electrical → Radiant → Chemical
Mechanical → Radiant → Chemical
60
Which describes the seasons as shown at point C in the diagram?
Summer
Spring
Winter
Fall
61
Is the following chemical equation balanced or unbalanced?
unbalanced
balanced
62
Where are the dwarfs found on the HR Diagram?
Left
Right
Top
Bottom
63
Calculate the
speed
of this object
0.25 ms-1
0.75 ms-1
0.5 ms-1
1.0 ms-1
64
What is wrong with this seasons diagram?
The tilt changes.
The arrows are going the wrong direction.
Nothing.
The Earth is too close to the sun.
65
Photosynthesis produces this energy transformation
gravitational to chemical energy
thermal to chemical energy
radiant to chemical energy
electric to radiant energy
66
What Energy Transformation takes place in a TV?
Electrical → Thermal and Nuclear
Electrical → Sound and Radiant
Electrical → Chemical and Radiant
Electrical → Mechanical and Sound
67
If the same force is applied to two objects, which has more acceleration?
The less massive object
The object with the greater initial speed
The more magnetic object
The more massive object
68
Is the following chemical equations balanced or unbalanced?
unbalanced
balanced
69
How do pesticides and chemicals get into groundwater supplies?
When transpiration occurs
After it rains and there is runoff
When it snows
After evaporation has taken place
70
Divergent boundaries are areas where plate tectonics...
move towards each other
move apart
scrape past each other
make mountains
71
How many times per month do spring tides occur
1
28
4
2
72
By what percentage does the energy decrease in an energy pyramid?
50%
100%
1%
10%
73
Which star on the HR Diagram is most luminous?
C
A
D
E
74
What happens to Kinetic Energy as Potential Energy is decreased?
Increases
It stays the same
Decreases
75
Metal, Nonmetal or Metalloid?
Nonmetal
Metal
Metalloid
Alkali Metals
76
In the figure, potential energy is being converted into kinetic energy from
The only energy involved is kinetic.
point A to point B
Energy is not being converted.
point B to point C
77
Which Law of Motion states "For every action, there is an equal and opposite reaction"?
2nd Law
1st Law
3rd Law
78
Which is an example of Newton's 3rd law?
A rocket launching
A car speeding up
A phone ringing
A ball rolling down a ramp
79
Is matter conserved in this test?
Yes
No
80
Which level of the energy pyramid contains the lowest amount of energy available?
A
C
All of the above
B
81
Calculate Average Speed
G
H
J
F
82
Which statement is TRUE for chemical equations?
Reactants on Right, Products on Left
Reactants on Both Sides
Products on Both sides
Reactants on Left, Products on Right
83
In comparison to the star Procyon, Antares is…
Brighter and hotter.
Dimmer and hotter.
Smaller in diameter.
Cooler and brighter.
84
Is the chemical equation shown balanced or unbalanced?
Balanced
Unbalanced
85
Is matter conserved in this reaction?
Yes
No
86
Acceleration depends on
mass and gravity
gravity and force
mass and force
87
Solve for ACCELERATION. Force = 10 Newtons. Mass = 2 kg.
Acceleration = 20 m/s/s
Acceleration = 5 m/s/s
Acceleration = 12 m/s/s
Acceleration = 8 m/s/s
88
Plate Tectonics
J
F
H
G
89
Law of conservation of mass states
matter is neither created or destroyed
Matter is created
matter is not created
matter is destroyed
90
Which ball has the greater amount of force acting on it? /Which has more acceleration?
Feather/Feather
Equal/ Bowling ball
Feather/Bowling ball
bowling ball/ Equal
91
Is this a balanced or unbalanced chemical equation
Unsure
Balanced
Unbalanced
92
What is the primary role of genes within chromosomes?
To regulate the transport of substances across the cell membrane
To determine inherited traits by encoding proteins
To control the energy production in cells
To store nutrients for the cell
93
Which of the following graphs shows no motion on a distance vs time graph?
D
A
C
B
94
Why is the Sun the biggest and bightest star for us?
The sun is the closest star to Earth
The sun is hotter than other stars
The Sun is the biggest star in the universe
The Sun is bright yellow
95
_________ succession generally happens faster.
Secondary
Primary
96
The diagram shows when seasons happen in different hemispheres. Which two things cause seasons?
Earth’s rotation and how close Earth is to the Sun
Earth’s orbit and the orbits of the other planets
Earth’s tilt and how fast Earth rotates on its axis
Earth’s orbit around the Sun and Earth’s tilt
97
What is the body system that controls and coordinates all other body systems?
integumentary
reproductive
endocrine
nervous
98
Is this a balanced or unbalanced chemical equation?
Unbalanced
Balanced
99
Where does our sun currently fall on the HR diagram?
Supergiants
Main sequence
White Dwarfts
Giants
100
Based on the weather map, we can predict that the weather will be _____.
warm with rain
warm with a breeze
cool with a breeze
cool with rain
