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Worksheets8th Grade Final Exam Study Guide
Total questions: 90
Worksheet time: 46mins
Name
Class
Date
1.
Which of Newton's Laws is also known as Inertia?
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
2.
If a car travels 200km in 4 hours, they are going __________.
a)
800 km
b)
5 hours
c)
40 km/h
d)
50 km/h
3.
Which of Newton's Laws states An object in motion will stay in motion and an object at rest will stay at rest unless acted on by a force.
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
4.
Which of Newton's Laws states The acceleration of an object depends on the mass of an object and the amount of force applied to the object.
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
5.
A material through which electrons can move easily is a __________.
a)
conductor
b)
insulator
c)
magnet
d)
charge
6.
A ______________ is complete and electric energy flows through it.
a)
closed circuit
b)
open circuit
c)
volt
d)
electric current
7.
Magnets A and B are of equal magnetic strength. In which positions will magnets A and B have the greatest attractive force toward each other?
a)
1
b)
2
c)
3
d)
4
8.
Letters A, B , C and D represent locations on a bar magnet. Which location has the greatest magnetic force?
a)
A
b)
B
c)
C
d)
D
9.
When the north poles of two different magnets are pushed together, they ______________.
a)
attract
b)
repel
10.
True or False: All metals are magnetic.
a)
True
b)
False
11.
Which of the following best illustrates attractive forces?
a)
N-N
b)
S-S
c)
N-S
d)
E-W
12.
An object with equal amounts of positive and negative charge is electrically __________.
a)
charged
b)
negative
c)
neutral
d)
positive
13.
When an object has more negative charge than positive charge, the object is called __________.
a)
electric discharge
b)
magnetic domain
c)
electric field
d)
electrically charged
14.
The diagram below represents a bar magnet. Six locations, A through F, are labeled on the magnet. Which two places have the strongest magnetic force?
a)
A and F
b)
B and E
c)
C and D
d)
D and F
15.
An electric field gets stronger as you __________.
a)
get closer to a charge
b)
get farther from a charge
c)
add negatively charged particles to a positively charged object
d)
remove negatively charged particles from a negatively charged object
16.
Which of the following shows that opposite charges attract?
a)
A
b)
B
c)
C
d)
D
17.
A/An ______________ is incomplete and no electric energy flows through it.
a)
closed circuit
b)
open circuit
c)
volt
d)
electric current
18.
A student builds a circuit that lights a lightbulb. A second bulb is added to the same loop between the first bulb and the battery. Which statement describes the brightness of each bulb?
a)
Each bulb will be as bright as the first bulb was.
b)
The first bulb will be the same brightness, and the second bulb will be dimmer.
c)
Each bulb will be dimmer than the first bulb was.
d)
The first bulb will be dimmer than it was, and the second bulb will not light.
19.
The circuit in the diagram is closed, so charge particles travel through the wires and light the bulbs.
a)
True
b)
False
20.
Adding which object to a circuit will create a potential energy difference in a circuit?
a)
switch
b)
wire
c)
lightbulb
d)
battery
21.
The illustration below represents balloon A, which has an electrical charge. Balloon A would be most attracted to which balloon?
a)
1
b)
2
c)
3
d)
4
22.
As the amount of charge on either of two charged objects increases, the electric force between the objects decreases.
a)
True
b)
False
23.
Two objects will experience an electric force of attraction when they have ____.
a)
like charges
b)
opposite charges
c)
the same amount of charge
d)
no charge
24.
If the distance between two charged objects increases, the electric force between them _____.
a)
decreases
b)
increases
c)
stops
d)
remains the same
25.
Which of the following statements about the forces between charged objects is NOT true?
a)
As the distance between charged objects decreases, the electric force between them decreases.
b)
If one object is positively charged and another is negatively charged, the objects will attract each other.
c)
Two negatively charged objects will repel each other.
d)
As the amount of charge on either object decreases, the electric force between them decreases.
26.
A current-carrying wire produces a magnetic field.
a)
True
b)
False
27.
The strength of an electromagnet can be increased by reducing the number of turns on the wire coil so that more current can flow.
a)
True
b)
False
28.
The more loops in a coil of wire around the core of an electromagnet, the stronger the magnetic force.
a)
True
b)
False
29.
What makes an electric motor spin?
a)
The permanent magnet and the electromagnet continuously attract each other.
b)
The permanent magnet and the electromagnet continuously repel each other.
c)
The permanent magnet and the electromagnet alternately attract and repel each other.
d)
The permanent magnet and the electromagnet alternately attract and repel the power source.
30.
The south pole of a magnet ____.
a)
attracts another south pole
b)
repels a paper clip
c)
attracts a north pole
d)
repels a north pole
31.
Which of the following describes both an electromagnet and a permanent magnet?
a)
The poles can be reversed.
b)
The strength of the magnetic force can be controlled.
c)
The magnetic force can be turned off and on
d)
It has a north pole and a south pole.
32.
What type of force is responsible for the attraction and repulsion of charged particles?
a)
Gravitational Force
b)
Electromagnetic Force
c)
Nuclear Force
33.
Electricity and magnetism are separate forces that have no connection to each other.
a)
True
b)
False
34.
Electromagnets only work when the electric current is turned on.
a)
True
b)
False
35.
Almas makes an electromagnet to pick up small metal pins as shown below. How would increasing the number of wire loops around the nail affect the strength of the electromagnet?
a)
It would increase the strength of the electromagnet.
b)
It would decrease the strength of the electromagnet.
c)
It would not change the strength of the electromagnet.
36.
Petrit places a magnetic compass next to a wire. He connects the wire to a battery. Once an electric current starts flowing through the wire the compass needle changes direction. How does the electric current in the wire produce this effect?
a)
It generates a contact force that pulls on the compass needle and causes it to move.
b)
It generates an electric field that affects the electric charges in the compass needle.
c)
It generates a magnetic field that affects the compass needle.
37.
At a science museum, Ella finds some stationary bikes with magnets attached to their back wheel. When Ella pedals a bike, the magnets on the wheel rotate through a coil of wire. This produces an electric current that lights up a series of lightbulbs. She then pedals a bike at the same speed, but with weaker magnets on the back wheel. How would pedaling a bike with weaker magnets affect the electric current generated?
a)
It would increase the electric current generated.
b)
It would decrease the electric current generated.
c)
Using a bike with weaker magnets would not affect the electric current generated.
38.
Which statement is true?
a)
As the electric current through a wire increases, the magnetic field around the wire becomes stronger.
b)
As the electric current through a wire increases, the magnetic field around the wire becomes weaker.
c)
As the electric current through a wire increases, the magnetic field around the wire is unaffected.
d)
As the electric current through a wire decreases, the magnetic field around the wire becomes stronger.
39.
A ______________ is incomplete and no electric energy flows through it.
a)
closed circuit
b)
open circuit
c)
volt
d)
electric current
40.
Jane is studying electrical forces using two metal paper clips. The paper clips both have equal negative charges and are placed 30 cm away from each other. Jane quadruples the charge on one of the paper clips. The other paper clip’s charge doesn’t change and it is not moved. How does the electric force between the paper clips change?
a)
The electric force is reduced to a fourth of the original force.
b)
The electric force is sixteen times bigger.
c)
The electric force stays the same.
d)
The electric force is quadrupled.
41.
A negatively-charged plastic comb and a negatively-charged rubber balloon are brought closer together.
How does the electric force between the comb and balloon change when they are brought closer together?
a)
The electric force increases.
b)
The electric force decreases.
c)
The electric force does not change.
42.
When Micah takes his socks out of the dryer, he notices they are sticking to his shirt. Before the socks were run through the dryer, they didn’t stick to his shirt. Micah’s father notes that there is an electric force between his shirt and the socks. What could have happened to the socks in the dryer to cause this electric force?
a)
His socks gained a net electric charge.
b)
His socks lost a net electric charge.
c)
The net electric charge of the socks did not change.
43.
The diagram below shows two electrically-charged foam balls. Both of the foam balls are positively-charged. Both foam balls are also at rest. Which diagram best represents the electric force between the two foam balls?
a)
A
b)
B
c)
C
44.
Dayana held two magnets near one another. She then changed their positions as shown in the diagram below. How did the magnetic force between the magnets change?
a)
The magnetic force became weaker.
b)
The magnetic force became stronger.
c)
The magnetic force changed from repelling to attracting.
d)
The magnetic force changed from attracting to repelling.
45.
A group of students is studying two magnets, Magnet A and Magnet B. They notice a compass needle will point toward magnet A at a distance of 5 cm. However, at a distance of 7 cm, the compass needle doesn’t move. Magnet B will cause the compass needle to move at both 5 and 7 cm. What conclusion can be drawn?
a)
Magnet A is stronger than Magnet B.
b)
Magnet A and Magnet B are of equal strengths.
c)
Magnet B is stronger than Magnet A.
46.
Alma holds two magnets 10 cm apart. At this distance, it isn’t hard to keep the magnets from moving toward each other. Then, she holds the magnets 8 cm apart and notices that they are much harder to keep apart.
a)
When magnets are moved closer to each other, the magnetic force decreases.
b)
When magnets are moved closer to each other, the magnetic force increases.
c)
When the magnets are moved closer to each other, the magnetic force does not change.
47.
As a candle burns, the chemical energy stored in the wax is transformed into
a)
heat and light
b)
heat and magnetism
c)
electricity and light
d)
electricity and magnetism
48.
Which of the following materials is a good conductor of electricity?
a)
rubber
b)
wood
c)
copper
d)
glass
49.
Which of the following materials is a good insulator?
a)
rubber
b)
copper
c)
silver
d)
gold
50.
The movement of electrically charged particles is called _______________.
a)
closed circuit
b)
open circuit
c)
voltage
d)
electric current
51.
Two positively-charged rubber balls are on a table, rolling toward each other. How does the electric force between the balls change as they get closer together?
a)
The electric force increases.
b)
The electric force decreases.
c)
The electric force does not change.
52.
An electromagnet is a current-carrying wire wrapped around a copper core.
a)
True
b)
False
53.
___________ is the electrical potential energy difference between two places on a circuit.
a)
Voltage
b)
Electrical Current
c)
Energy
d)
Electricity
54.
If a 100 kg box is pushed with a force of 5 N, what is the resulting acceleration?
4 lines
55.
Look at the free-body diagram below. In what direction would the object move?
a)
left
b)
right
c)
up
d)
down
56.
An object is pushed to the left with 20N of force and pulled to the right with 10N of force. What is the net force and in what direction will the object move?
4 lines
57.
Which of Newton's Laws is represented in the picture below?
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
58.
Which of Newton's Laws is represented in the picture below?
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
59.
Which of Newton's Laws states An object in motion will stay in motion and an object at rest will stay at rest unless acted on by a force.
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
60.
Which of Newton's Laws gave us the formula F=ma?
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
61.
Which of Newton's Laws states For every action there is an equal and opposite reaction?
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
62.
What is Newton's 1st law? Please provide one example that demonstrates this law. Be sure to answer all parts of the question and to use complete sentences.
4 lines
63.
The stored energy that an object has due to its position or state is called (a) .
64.
Which law states that energy cannot be created or destroyed?
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Law of Inertia
d)
Law of Conservation of Energy
65.
A stretched rubber band has which type of energy?
a)
Kinetic Energy
b)
Potential Energy
66.
When a pendulum reaches its highest point, it has maximum __________.
a)
Kinetic Energy
b)
Potential Energy
67.
A falling object gains ____________ energy and loses ____________ energy.
a)
potential, kinetic
b)
kinetic, potential
68.
The potential energy of an object depends on its __________ and its height.
a)
length
b)
mass
69.
A rubber ball is dropped and bounces back up. The ball has ________________.
a)
zero potential energy at A
b)
zero kinetic energy at C
c)
kinetic energy at B
d)
potential energy at B
70.
Assuming each ball has the same mass, which ball has the greatest potential energy?
a)
A
b)
B
c)
C
d)
D
71.
In the image below which two positions show where the ball has maximum kinetic energy?
a)
Position A
b)
Position B
c)
Position C
d)
Position D
e)
Position E
72.
Ishaan and Dhruv are identical twins that have the same mass. They are racing each other after school. Ishaan is running at half the speed of Dhruv. How do the twins’ kinetic energies compare?
a)
Ishaan has a quarter the kinetic energy of Dhruv.
b)
Ishaan has half the kinetic energy of Dhruv.
c)
Ishaan has twice the kinetic energy of Dhruv.
d)
Ishaan has four times the kinetic energy of Dhruv.
73.
_____________ is the energy of motion.
a)
Kinetic energy
b)
Potential energy
c)
Newton's Laws
74.
_____________ is the energy that is stored in an object due to being stretched or compressed.
a)
Kinetic energy
b)
Elastic potential energy
c)
Gravitational potential energy
75.
Increasing the ____________ would increase the kinetic energy most.
a)
mass
b)
speed
c)
distance
d)
time
76.
Kinetic energy is dependent on ___________ and __________.
a)
height, speed
b)
mass, height
c)
mass, speed
d)
speed, distance
77.
Jose is helping his father repair the roof on their house. He climbs up a ladder from the ground to a roof.
How did Jose change his gravitational potential energy?
a)
His gravitational potential energy decreased.
b)
The gravitational potential energy between Jose and Earth did not change.
c)
His gravitational potential energy increased.
78.
Which of the following is displaying gravitational potential energy?
a)
a bow and arrow
b)
a cell phone on the edge of a table
c)
a car driving up a hill
d)
a spring
79.
The graph below shows the distance Meagan drove in 10 seconds. What is happening from 1-4 seconds?
a)
Meagan is driving up a hill.
b)
Meagan is driving at a constant speed.
c)
Meagan is speeding up.
d)
Meagan is stopped.
80.
The graph below shows the distance Meagan drove in 10 seconds. What is happening from 4-8 seconds?
a)
Meagan is driving up a hill.
b)
Meagan is driving at a constant speed.
c)
Meagan is speeding up.
d)
Meagan is stopped.
81.
The __________ is the starting point you choose to describe the location or position of an object
a)
reference point
b)
position
c)
motion
d)
force
e)
energy
82.
The __________ is an object’s distance and direction from the reference point
a)
reference point
b)
position
c)
motion
d)
force
e)
energy
83.
The __________ is the process of changing position.
a)
reference point
b)
position
c)
motion
d)
force
e)
energy
84.
Cars A, B, and C are driving on a road as shown below. The dots behind each car show their location every 1 second as they drive. Which of the following is true?
a)
Only car A is accelerating.
b)
Only cars A and B are accelerating.
c)
Only car C is accelerating.
d)
All of the cars are accelerating.
85.
When penguins swim, they occasionally jump up out of the water. This behavior, called porpoising, helps them swim faster because they can take breaths without slowing down. A wildlife biologist takes a video of a penguin swimming and porpoising. Then, she uses the video to make the graph of the penguin's distance vs. time shown below. What is the penguin's average speed during the 40 seconds shown on the graph?
a)
0.4 m/s
b)
2.5 m/s
c)
20 m/s
d)
50 m/s
86.
A pathway for electricity to travel is called___________
a)
current
b)
static electrcity
c)
circuit
d)
circle
87.
Which device or devices could be removed without breaking the electric circuit?
a)
Only the bulb
b)
Only the switch
c)
The battery and the switch
d)
The bulb and the switch
88.
A continuous flow of electricity is called_____________
a)
series
b)
circuit
c)
static
d)
current
89.
What will happen when you remove a bulb from the circuit pictured?
a)
The other bulb will become brighter.
b)
The other bulb will turn off.
c)
The other bulb will become dimmer.
d)
It will remain a closed circuit.
90.
Which kind of circuit only has one path for electricity to flow?
a)
Series
b)
Parallel
c)
Series and Parallel
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