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WorksheetsUnit 2 Review
Total questions: 85
Worksheet time: 1hrs 9mins
Name
Class
Date
1.
Which type of energy is changed by plants into chemical energy?
a)
solar
b)
nuclear
c)
gravitational
d)
thermal
2.
A roller coaster is climbing up the highest hill on its track. At which point will the front car of the coaster most likely have its greatest potential energy?
a)
at the bottom of the highest hill
b)
at the top of the highest hill
c)
at the start of the track
d)
at the end of the track
3.
The diagram shows a 21.7-kg ball located on a shelf 1.6 m above the ground.
Which best describes the energy of the ball?
Which best describes the energy of the ball?
a)
It has mechanical energy in the form of potential energy.
b)
It has mechanical energy in the form of kinetic energy.
c)
Its energy depends upon the speed the ball will travel.
d)
Its energy is lost once it falls off the shelf.
4.
This diagram shows the motion of a ball down a hill.
What happened to the ball’s energy from Point 1 to Point 4?
What happened to the ball’s energy from Point 1 to Point 4?
a)
Stored energy was transformed into energy of motion.
b)
Energy of motion was transformed into chemical energy.
c)
Stored energy in the ball applied a force to get the ball to move.
d)
Internal energy caused the ball to move until the energy was gone.
5.
The diagram shows a child swinging on a swing set.
As the child moves from left to right, at which point will the maximum kinetic energy be reached?
As the child moves from left to right, at which point will the maximum kinetic energy be reached?
a)
1
b)
2
c)
3
d)
4
6.
As a roller coaster car travels down a hill, which type of change in energy allows it to speed up?
a)
kinetic energy changing into potential energy
b)
kinetic energy changing into heat energy
c)
potential energy changing into kinetic energy
d)
potential energy changing into heat energy
7.
Which form of energy does a car’s engine convert into mechanical energy?
a)
light
b)
wind
c)
chemical
d)
gravitational
8.
Look at the drawing of the ball bouncing below.
Which of the following is the correct sequence of words to use to indicate the different types of energy shown in the drawing?
Which of the following is the correct sequence of words to use to indicate the different types of energy shown in the drawing?
a)
potential, potential, kinetic, kinetic
b)
potential, kinetic, potential, kinetic
c)
potential, kinetic, kinetic, potential
d)
kinetic, potential, potential, kinetic
9.
Barbara placed a marble at different places on a ramp. At which place will the marble have the most potential energy?
a)
a
b)
b
c)
c
d)
d
10.
In a gasoline-powered car, chemical energy from gasoline is transformed to make the car move. The motion of the car is what form of energy?
a)
radiant energy
b)
nuclear energy
c)
electrical energy
d)
mechanical energy
11.
Which of the diagrams shows the correct way to set up a circuit that will light the bulb?
a)
b
b)
d
c)
c
d)
a
12.
A student is investigating the transfer of electrical energy in a circuit. In which circuit will electrical energy light the bulb?
a)
c
b)
b
c)
d
d)
a
13.
According to the illustration which way (A or B or C) of getting an object up the hill requires the most work?
a)
A
b)
B
c)
C
d)
D
14.
According to the illustration which way (A or B or C) of getting an object up the hill requires the least amount of work?
a)
A
b)
B
c)
C
d)
D
15.
A house uses a roof to carry away large amounts of rain efficiently. A roof composed of two attached inclined planes forms what type of simple machine?
a)
screw
b)
ramp
c)
lever
d)
wedge
16.
An escalator is a compound machine that can be found in many buildings. The stairway on an escalator moves in a loop, which helps people move from one floor of a building to the next. The stairway loop moves with the help of a wheel and axle.
The stairway of the escalator is an example of which simple machine?
The stairway of the escalator is an example of which simple machine?
a)
screw
b)
lever
c)
inclined plane
d)
wedge
17.
How can an inclined plane make work easier?
a)
by increasing the effort necessary to raise an object
b)
by decreasing the effort required to raise an object
c)
by increasing the amount of friction necessary for the task
d)
by decreasing the efficiency of the task
18.
Which simple machine would be the most efficient for lifting an object 30 m off? the ground?
a)
pulley
b)
screw
c)
lever
d)
wedge
19.
Which of the following is used as a wedge?
a)
a baseball bat
b)
a faucet handle
c)
a bicycle pedal
d)
a needle
20.
Which occurs as the pendulum moves from pt 3 to pt 5
a)
kinetic energy increases while potential stays the same
b)
potential energy increases while kinetic stays the same
c)
kinetic energy decreases and potential energy increases
d)
potential energy decreases as kinetic increases
21.
Which best explains the energy transfer in a circuit containing a battery, wire and a light bulb?
a)
electrical, chemical, light, heat
b)
chemical, electrical, heat, light
c)
electrical, mechanical, light, chemical
d)
chemical, mechanical, electrical, heat
22.
What happens when a pebble lying on the ground is kicked?
a)
energy is completely lost
b)
energy is transferred
c)
energy is destroyed
d)
energy is created
23.
The diagram shows a ball moving along a track. The starting point for the ball is H and the ending point is x.
Which order shows the greatest to least amount of potential energy.
Which order shows the greatest to least amount of potential energy.
a)
H,A,B
b)
H,B,A
c)
B,H<A
d)
A,B,H
24.
How does flipping a switch to the on position make a bulb light up?
a)
it opens the circuit allowing light energy to convert to electrical energy
b)
it closes the circuit allowing light energy to convert to electrical energy
c)
it closes the circuit allowing electrical to convert to light energy
d)
it opens the circuit to allow electrical energy to convert to light energy
25.
A truck traveling at 45mph along road comes to a stop. Which best explains the mechanical energy of the truck as it is moving?
a)
the mechanical energy of the truck is the same as the potential energy
b)
the mechanical energy is the same as the trucks kinetic energy
c)
the mechanical energy depends on the effect of gravity on the truck
d)
the mechanical energy depends on the direction the truck is traveling
26.
Electric circuits provide energy for light bulbs. Which of these prevents the flow of electrons?
a)
a circuit that is closed
b)
a series circuit
c)
a parallel circuit
d)
a circuit that is open
27.
Base your answer to the following question on the drawing of a wheelbarrow. What two simple machines does the wheelbarrow use?
a)
a lever and a wheel and axle
b)
a pulley and a screw
c)
an inclined plane and a wheel and axle
d)
a wedge and a pulley
28.
In which circuit would the light bulb glow?
a)
a
b)
b
c)
c
d)
d
29.
When did it happen?
a)
When did what happen?
b)
How should I know?
c)
What?
d)
This is not fair!!
30.
Electric circuits provide energy for light bulbs. Which of these prevents the flow of electrons?
a)
a series circuit
b)
a circuit that is open
c)
a circuit that is closed
d)
a parallel circuit
31.
Which pulley system requires the least amount of force to move the object?
a)
a
b)
b
c)
c
d)
d
32.
The sound made by crickets occurs when the male crickets rubs its two hind legs together. Which type of energy transformation results in the sound made by crickets?
a)
sound energy to thermal energy
b)
thermal energy to chemical energy
c)
mechanical energy to sound energy
d)
mechanical energy to chemical energy
33.
The drawing shows a wind-up toy. The key is wound or turned. When it is released, the toy will move.
When would the wind-up toy have the greatest potential energy?
When would the wind-up toy have the greatest potential energy?
a)
when it has come to a stop
b)
while it is in motion
c)
after it is wound
d)
before it is wound
34.
Which best describes the energy of the ball?
a)
Its energy is lost once it falls off the shelf.
b)
Its energy depends upon the speed the ball will travel.
c)
It has mechanical energy in the form of potential energy.
d)
It has mechanical energy in the form of kinetic energy
35.
According to the image, which point on the illustration does not require the most work, nor does it require the least amount of work
a)
A
b)
B
c)
C
d)
D
36.
The diagram shows a mass suspended on a string called a pendulum. What energy transformation occurs as the mass moves from point A to B?
a)
Kinetic energy is converted to potential energy.
b)
Potential energy is converted to kinetic energy
c)
Gravitational energy is converted to chemical energy.
d)
Chemical energy is converted to electromagnetic energy.
37.
Simple Machine 1 is determined to have a greater mechanical advantage (number of times the input force is multiplied by a machine) than Simple Machine 2 when moving an object. What can be concluded from this statement?
a)
Simple Machine 1 can move the object further than Simple Machine 2 can.
b)
Simple Machine 1 can lift heavier objects than can Simple Machine 2.
c)
Simple Machine 1 uses less force to move the object than does Simple Machine 2.
d)
Simple Machine 1 uses more force to move the object than does Simple Machine 2.
38.
Which of the following is a requirement for work to be done?
a)
Machine is used.
b)
Force moves an object.
c)
Force is exerted.
d)
Object is carried
39.
What type of simple machine is the tip of the dart?
a)
inclined plane
b)
lever
c)
wedge
d)
screw
40.
What is the best science class in the whole wide world?
a)
Mrs. Arnold :(
b)
Sid the Science Kid :(
c)
Mrs. Maree :)
d)
Bill Nye :(
41.
_______________ is the ability to do work.
a)
power
b)
energy
c)
mechanical energy
d)
strength
42.
the energy of an object due to its motion or position is __________________.
a)
potential energy
b)
radiant energy
c)
kinetic energy
d)
mechanical energy
43.
Running a race is an example of __________ energy.
a)
potential
b)
kinetic
c)
solar
44.
Store energy is known as _______________ energy.
a)
potential
b)
kinetic
45.
Energy of motion is known as __________________.
a)
potential energy
b)
kinetic energy
46.
Energy can neither be _________________ or __________________; it can only be _______________ or _________________.
a)
transferred, created transformed, destroyed
b)
created, destroyed charged, energized
c)
created, destroyed transferred, transformed
47.
A ball has more potential when __________________________.
a)
it is high in the air
b)
close to the ground
c)
in between its highest and lowest pont
48.
_____________ energy is energy from the sun/
a)
thermal
b)
chemical
c)
solar
d)
sound
49.
Maximum potential energy can be found at which point in the picture?
a)
1
b)
2
c)
3
d)
4
50.
Maximum kinetic energy can be found at point ___.
a)
1
b)
2
c)
3
d)
4
51.
_________________ makes the best conductors.
a)
wood
b)
metal
c)
plastic
d)
rubber
52.
When the light is on, the switich is _________.
a)
open
b)
closed
53.
When a light is off, the switch is ______.
a)
open
b)
closed
54.
A simple machine makes work ________.
a)
harder
b)
finished
c)
easier
d)
pay more
55.
Mechanical Advantage is how much a machine multiplies the ______________ put into it.
a)
resistance
b)
strength
c)
effort
d)
compatibility
56.
Mechanical Advantage is the ratio of how much work you _______________ to how much work you ________________.
a)
put into a machine...................get out of a machine
b)
get out of a machine.............put into a machine
57.
______________ is the force that you exert onto a machine.
a)
Natural force
b)
Input force
c)
Output force
d)
Contributed force
58.
_________________ is the force done by a machine.
a)
Input force
b)
Output force
c)
Applied force
d)
Machine force
59.
A doorknob is what type of simple machine?
a)
lever
b)
wheel and axle
c)
inclined plane
d)
pulley
60.
___________________ is the best class at EMS.
a)
PE
b)
7th grade Science
c)
Math
d)
ISS
61.
Which of the following does a simple machine do?
a)
allows the users to apply less force over a longer distance
b)
reduce the amount of force needed to do work
c)
change the direction of the applied force
d)
all of the above
62.
Identify this simple machine
a)
Lever
b)
Wheel & Axle
c)
Inclined Plane
d)
Screw
63.
What do you call a machine made up of two or more simple machines?
a)
complicated machine
b)
compound or complex machine
c)
comprehensive machine
d)
constructive machine
64.
An axe is an example of a
a)
pulley
b)
inclined plane
c)
screw
d)
wedge
65.
A seesaw is an example of a
a)
wedge
b)
lever
c)
inclined plane
d)
pulley
66.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
67.
Lightbulb
a)
wedge
b)
pulley
c)
incline plane
d)
screw
68.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
69.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
pulley
d)
screw
70.
The fixed point on the lever is called
a)
load
b)
resistance
c)
bar
d)
fulcrum
71.
The path an electrical current uses is called:
a)
Voltage
b)
Insulator
c)
Circuit
72.
Electric currents easily move through some material called:
a)
Circuits
b)
Conductors
c)
Isulators
73.
What is an electrical circuit?
a)
lets you turn the energy on and off
b)
a closed path where where electricity flows
c)
stop electricity from flowing through
74.
This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -
When the switch is closed the buzzer will sound because -
a)
the switch gives energy to the battery
b)
the buzzer is made of special plastic
c)
the wires are cooled by the surrounding air
d)
electricity can flow in a complete path
75.
An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —
To complete the circuit, a wire should be placed from —
a)
Point D to Point C
b)
Point B to Point C
c)
Point A to Point D
d)
Point B to Point D
76.
A student attached the parts as shown here and the bulb did not light.
The most likely reason the bulb does not light is because -
The most likely reason the bulb does not light is because -
a)
batteries can’t provide electric energy
b)
the flow of electricity can’t make a bulb light
c)
the switch must be open for electricity to flow
d)
yarn does not conduct electricity
77.
Will this configuration of a complete circuit and light a bulb?
a)
yes
b)
no
78.
This lamp produces light.
When the lamp produces light, it demonstrates that the lamp must have a –
When the lamp produces light, it demonstrates that the lamp must have a –
a)
powerful magnet
b)
rechargeable battery
c)
complete circuit
d)
plastic cord
79.
Will this configuration of a complete circuit light a bulb?
a)
yes
b)
no
80.
this is the symbol for a _____?
a)
switch
b)
light
c)
battery
d)
wires
81.
At what point in the roller coaster will the car have the greatest potential energy?
a)
A
b)
B
c)
C
d)
E
82.
At what point in the roller coaster would the car have the greatest kinetic energy?
a)
A
b)
B
c)
D
d)
F
83.
At what letter does the bike rider have the most kinetic energy?
a)
W
b)
X
c)
Y
d)
Z
84.
At what letter does the bike rider have more potential and less kinetic energy?
a)
W
b)
X
c)
Y
d)
Z
85.
When a rock on a cliff starts to fall, how does the energy change?
a)
Potential increases and kinetic decreases
b)
Kinetic increases and potential decreases
c)
They both stay the same
d)
They both increase
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