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8th Grade Science Review
8th Grade Science Review
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1
What is the net force?
3 N to the right
17 N to the left
17 N to the right
3 N to the left
2
Which situation is an example of increasing potential energy?
pulling a wagon uphill
a cat jumping from a tree
a bicyclist stopping at a stop sign
emptying a bucket of water
3
Fill in the Blank: Kinetic energy is defined as energy in ____________.
Stored
Motion
Physics
Florida
4
What happens to Kinetic Energy as Potential Energy is decreased?
Decreases
It stays the same
Increases
5
During a lunar eclipse...
the moon is obscured
the earth is obscured
you are obscured
the sun is obscured
6
What phase of the lunar cycle does this show?
1st quarter
new moon
full moon
3rd quarter
7
Newton’s third law of motion describes
action and reaction forces.
resting forces
net force
balanced forces
8
Calculate the net force.
950 N to the right
900 N to the right
950 N to the left
900 N to the left
9
When more energy is added to a wave, its amplitude does what?
increases
stays the same
goes to zero
decreases
10
True or False: Everyone around the world is able to see every total solar eclipse.
False
True
11
True or False: During a solar eclipse, the Moon casts a shadow on Earth.
False
True
12
What phase of the lunar cycle does this show?
1st quarter
3rd quarter
full moon
new moon
13
The Lunar cycle is caused by:
the pull of gravity by the moon every 13 hours
The moon revolving around the Earth every 29 days
the tilt of the Earth's axis
Earth spinning on its axis once every 24 hours
14
What is the main
cause of the seasons
?
The tilt of the Earth
The rotation of the Earth
The distance from the Sun
The revolution of the Earth
15
What is Newton's 1st law?
Law of Action-Reaction
Law of Inertia
None of these
Law of Force and Acceleration
16
Index Fossils...
B. Are found in multiple regions in a specific layer
Both A and B are correct
There is no such thing as index fossils
A. Appear only in one layer
17
Frequency determines pitch, amplitude determines:
height
volume
ear drum
pitch
18
Which letter represents the amplitude?
B
C
A
D
19
Lunar Cycle
D
B
A
C
20
According to the Law of Superposition, the oldest fossil in this diagram would be:
trilobite
whale
bird
fish
21
Newton's First Law of Motion is known as the LAW OF_________________
Force
Inertia
Action
Reaction
22
How do "index fossils" help geologist in dating rock layers?
they help determine absolute age of different rock layers
they don't help geologists at all
they help determine relative age of different rock layers
they are one of the laws of stratigraphy
23
The FIRST phase of a lunar cycle is
new moon
waxing crescent moon
first quarter moon
24
According to the phylogenetic tree, which organisms are least related to each other?
Insecta and Crustacea
Trilobita and Insecta
Trilobita and Chelicerata
Insecta and Myriapoda
25
What is Newton' 2nd Law?
Law of Inertia
None of these
Law of Force and Acceleration
Action-Reaction Law
26
As a tool, the law of superposition enable a geologist to
Determine the absolute age of a rock layer
Identify bottom layer as being the the youngest
Measure the flow of lava from a volcanic vent
Establish relative age of a sedimentary layer
27
How many moon phases are there in one lunar cycle?
29.5
3-4
8
1 month
28
Describe the Net force
Balanced 0 N
Balanced 80 N right
Unbalanced 80 N right
Unbalanced 180 N left
29
True or False: Lunar eclipses occur during every lunar cycle.
False
True
30
A lunar eclipse happens when _____.
the moon changes its orbit
the sun stops shining for a moment
Earth's shadow is cast on the moon
the moon's shadow is cast on Earth
31
The fossil record supports Darwin’s theory of evolution by showing that plants and animals:
have changed over time.
remain unchanged until extinction.
are the same in various environments.
existed for only a few thousands of years
32
Which of the following contains kinetic energy?
A pen sitting on the edge of a table
A soccer ball right before the kick
A car driving 3 miles per hour
A boulder sitting on the top of a mountain
33
Which point on the coaster's path represents the maximum kinetic energy?
D
B
A
C
34
Newton’s second law says that when an _____ force is applied to a _____, it causes it to_____.
force, mass, acceleration
External, mass, acceleration
mass, acceleration, external force
acceleration, force, mass
35
T/F. The distance that Earth is from the sun makes the seasons change.
False
True
36
Which is an example of Newton's 3rd law?
A car speeding up
A ball rolling down a ramp
A phone ringing
A rocket launching
37
The seasons of the year are...
Winter, Autumn, Spring and July
Summer, Winter, Fall and Spring.
Summer, Winter, Autumn and Spring
Summer, Spring, Autumn and December
38
Which ball has more potential energy?
Blue
Green
39
Fill in the Blank: Potential energy is referred to as ___________ energy.
Mechanical
Motion
Kinetic
Stored
40
An object's potential energy will increase with
height and mass
speed and height
height only
speed only
41
How many phases are there in the lunar cycle?
365
2
24
8
42
Describe the Net force.
Unbalanced 185 N right
Unbalanced 15 N right
Balanced 0 N
Unbalanced 15 N left
43
According to the Law of Superposition, which of these layers is the oldest?
The darkest layer
The bottom layer
The top layer
The lightest layer
44
What causes the Earth to have seasons?
The Earth rotation only
The Earths tilt & revolution
The Earths revolution only
The Earths tilt & rotation
45
Newton’s third law is: every action causes an equal and opposite reaction.
False
True
46
Why do we
NOT
have
lunar or solar eclipses all the time
?
Diameter of the moon is greatest at new moon
Moon's orbit is tilted relative to the Earth
New moon phase is only at night
Night side of the moon faces toward Earth
47
Which point on the roller coaster shows the LEAST amount of potential energy?
A
B
D
C
