stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
8th Science Review 1 Flashcards | StudBud
Explore
/
8th Science Review 1
8th Science Review 1
35 terms
·
StudBud Administration
·
185 plays
Review for 8th grade science staar test
Flashcards
35 cards
F
Practice quiz
P
Host live
L
Questions
35
Answers
1
If the load exerts a strong downward force, the glue must -
Exert an upward force that is equal to the downward force
Exert a stronger downward force
Destroy the force
Cause the load to accelerate upward
2
A meteor moving 468km/min is moving in a south-to-north direction. Describe the meteors motion.
Its velocity was 7.8 km/s northward
Its acceleration was 468 km/s
Its speed was 468 km/s
Its acceleration was 7.8 km/s
3
Which of the following is a chemical change that occurs in the food?
The reduction in size of food particles as food is chewed
The breakdown of food by enzymes and acid in the stomach
None of the above
The movement of food to the stomach after food is swallowed
4
Which observation provides evidence of a chemical reaction?
How water heating aluminum foil
How water cools
A liquid solution changes color
A pan is lined with aluminum foil
5
A satellite detected a small, bright object with a fan-shaped tail. The object was likely-
A comet
An asteroid
A meteor
A Nebula
6
Barnard's Star has a temperature of 2,800 K. What spectral class does Barnard's Star belong to?
Spectral Class M
Spectral Class B
Spectral Class A
Spectral Class O
7
How does the agricultural activity most likely affect the surface water of the area?
Crops absorb water from soil, creating salt in the water.
Excess crop fertilizer is carried by runoff into the river.
Excess crop material accumulates on the riverbanks.
Crops reduce erosion, increasing soil in the river
8
The main function of this body system is to-?
Remove Waste
Produce Hormones
Control Reproduction
Transport Oxygen
9
Which of these most likely explains why the bacteria population stopped growing?
They mutated to carnivorous organisms and ate each other
They became diseased and were unable to survive
The Bacteria did not reproduce and individually died out.
The bacteria died after all the nutrients were consumed
10
What energy transformation occurs between a microwave and a meal?
Electrical -> Light -> Chemical
Electrical -> Electromagnetic -> Thermal
Chemical -> Thermal -> Light
Chemical -> Electromagnetic -> Chemical
11
If there is a third-quarter moon on July 2nd, what is the date of the next full moon?
July 23
July 9
July 30
July 16
12
Which organelle stores information that determines an individual's blood type?
Organelle 4
Organelle 2
Organelle 1
Organelle 3
13
Which set of moon phases would come next?
F
J
G
H
14
Which of these most likely caused the changes in the sand dunes over multiple weeks?
Blowing Wind
Crustal uplift
Ocean Waves
Flowing Rivers
15
An archer shot a 0.06kg arrow that accelerated at 5,000m/s
2
. What was the net force?
2500
30,000
30
300
16
Which of the metals has a density of 2.71 g/cm
3
?
Metal 3
Metal 4
Metal 1
Metal 2
17
Which statement best describes the acceleration of the box?
3.0m/s because the combined forces cause acceleration
The box does not accelerate
1.9m/s to the right because the greater force that direction
1 m/s to the right because net force is 17 N to the right
18
How many seconds did it take for the ball to travel 30m during kick 3?
1.5 s
1.0 s
2.0 s
0.5s
19
Which model represents an organic compound?
Model J
Model G
Model H
Model F
20
Which of these statements is not true?
Lactose contains twice as many carbon atoms as sorbitol.
fructose contains four more atoms then glutamine
Lactose contains twice as many atoms as fructose
Sorbitol contains 3 more oxygen atoms than glutamine
21
Which of these will naturally increase the biodiversity of the area?
Building artificial reefs and increasing fishing activity
Building artificial reefs and limiting fishing activity
Elimination non-native species and fishing for large fish
Introducing non-native species to fill habitats
22
Volcanic activity would most likely be found at -
Location W
Location Y
Location Z
Location X
23
Which pair of properties describes the elements in group 18?
They have eight valence electrons and are flammable
They are gaseous at room temp. and chemically stable
They are chemically stable and liquid at room temperature
They are magnetic and boil at low temperatures
24
Which best describes the type of tectonic activity that forms rift valleys?
Where an oceanic plate moves under another oceanic plate
Where a plate slides horizontally past another plate
Where two plates move away from each other
Where a continental plate moves under an oceanic plate
25
Which correctly describes the potential and kinetic energy of the bicycle rider?
at the bottom, kinetic and potential decrease
as she moves up, kinetic increases, potential decreases
At the hilltop, potential = greatest and kinetic = least.
as she moves down, potential decreases and kinetic increases
26
By sprouting in the rain-forest canopy, the strangler fig seedling is exposed to more -
Nutrients
Consumers
Sunlight
Soil
27
Which statement correctly describes the location and charge of the electrons in an atom?
Electrons are inside the nucleus and have a negative charge
Electrons are outside the nucleus and have no charge
Electrons are outside the nucleus and have a negative charge
Electrons are inside the nucleus and have no charge
28
What is the total number protons, neutrons, and electrons in Cadmium?
64
160
48
96
29
Which statement does NOT describe a relationship shown in the food web?
Mice are consume grasses and are preyed on by snakes
Rabbits consume shrubs and are parasites of grasses
Owls prey on rabbits and frogs
Elk are prey for mountain lions
30
Which development would most likely have reduced its strength before it hit Hanoi?
A high pressure area to the south
A low pressure area to the south
Cool water moving into the sea from the east
Warm water moving into the sea from the east
31
Which of these describes why the leaf fell in a crooked path instead of straight down?
Air currents and gravity applied unbalanced forces
The upward force of air was greater than gravity
Objects with irregular shapes never fall in straight lines
It's forces were balanced so it continued in that direction
32
Which organisms all consume the same producer?
Sea urchins, crabs, octopuses
Tiger sharks, dolphins, octopuses
Crabs, pilchards, blennies
Euphausiids, sweeps, water fleas
33
Which conclusion about the chemical reactivity of these elements is valid?
Fluorine is most reactive - due to its 7 valence electrons
Si is most reactive due to equal protons and neutrons
Boron is the most reactive because it has the most protons
Gallium is most reactive due to more protons and neutrons
34
Which ecosystem is likely to be the least sustainable?
3 because it has few predators
1 because it has the fewest species
4 because it supports many animals
2 because it includes both aquatic and terrestrial species
35
Why do other stars look much dimmer that the sun?
Light traveling through space gets reflected.
Other stars are made up of different gases.
The Sun is yellow, which is more visible than other colors.
The Sun is much closer to the Earth than other stars are.
