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STAAR Review
STAAR Review
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Review for the 8th grade science STAAR test
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
Which layer of the Earth does a tectonic plate ride on top of?
stratosphere
atmosphere
asthenosphere
lithosphere
2
The control center of a cell is the
endoplasmic reticulum
organelle
nucleus
cytoplasm
3
What would happen if the time it took for Earth to complete one rotation increased?
a day would be longer
a year would be longer
a year would be shorter
a day would be shorter
4
The Hertzsprung-Russell diagram graphs stars based on
brightness and absolute magnitude
diameter and brightness
brightness and temperature
distance and brightness
5
It can be important to know the velocity of an object, not just its speed, because
speed is only useful for fast-moving objects
velocity also tells direction
speed is always an average
velocity also tells acceleration
6
A structure that is found in plant cells but not animal cells is a
nucleus
cell membrane
nuclear membrane
cell wall
7
Which statement best summarizes Newton's 3rd law of motion?
all forces act in pairs
friction slows objects
inertia
force = mass x acceleration
8
All of the following are evidence of a chemical reaction except
the production of a gas
the formation of a new substance
a change in color
a solid dissolved into a liquid
9
An element's properties can be predicted from its
location on the periodic table
symbol
atomic mass
number of neutrons
10
What form of energy is stored in food?
light energy
mechanical energy
chemical energy
kinetic energy
11
How can you tell that work has been done on an object?
the object moves position
the object stays in the same position
the object experienced a force
the object exerts an equal and opposite force
12
The living parts of an ecosystem are known as
producers
abiotic factors
consumers
biotic factors
13
What is correct order for the color of a star from coolest to hottest?
white, blue, yellow, red
blue, yellow, white, red
red, yellow, white, blue
yellow, white, blue, red
14
Which of the following is an example of acceleration?
a car moves in a straight line at 60 mph
a boat sits on a boat trailer
a bus moves on a straight road and then turns right
a plane moves in the air at a steady speed of 850 mph
15
Elements in the same group on the periodic table share characteristics because
they have the same atomic number
they have the same atomic mass
they have the same number of valence electrons
they have the same number of protons
16
Which of the following organisms might be a tertiary consumer?
great white shark
frog
athlete's foot fungus
redwood tree
17
Which organelles are more numerous in more active cells that in less active cells?
vacuoles
mitochondria
golgi bodies
ribosomes
18
The south pole is tilted towards the sun in
March
September
December
June
19
Scientists rejected Wegener's theory because he could not
describe the climate of Pangaea
explain why continental crust was denser than oceanic
describe how seeds moved from Africa to South America
explain what forces pushes or pulls the continents
20
The atomic number of bromine is 35. From this information you know that a bromine atom has
35 protons and 35 electrons
an atomic mass of 35
35 protons and 35 neutrons
35 electrons and 35 neutrons
21
Which term is used to describe the rate at which the velocity of an object changes?
force
energy
speed
acceleration
22
What can cause a chain of volcanic mountains to form far from a plate boundary?
rifting
folding
hot spot
subduction
23
Which of the following is an example of a chemical change?
baking a cake
breaking glass
mixing milk and chocolate syrup
melting butter
24
Which group of the periodic table has a complete set of valence electrons?
group 17
group 14
group 1
group 18
25
An element's _____ shows the number of protons in its nucleus.
atomic mass
period
chemical symbol
atomic number
26
A close relationship between two species that benefits at least one of the species is called
symbiosis
predation
competition
homeostasis
27
Sea-floor spreading occurs
on both sides of the midocean ridge
on the continental side of a deep ocean trench
in the mantle
on the ocean side of a deep ocean trench
28
What is a difference between eukaryotic cells and prokaryotic cells?
only prokaryotic cells have genetic material
only eukaryotic cells have membrane-bound organelles
only eukaryotic cells have a cell membrane
only prokaryotic cells have cytoplasm
29
What is the main function of the excretory system?
to break down nutrients into smaller molecules
to obtain oxygen and transport it to all tissues
to regulate and control the other body systems
to remove waste from the body
30
How long a star lives depends on
its mass
its color
whether its a single or binary
its temperature
