WorksheetsPhysical Science B Final Exam Review
Total questions: 80
Worksheet time: 41mins
In audio speakers, an electromagnet is placed in a magnetic field created by a permanent magnet. The ________ in the solenoid rapidly switches direction, which also switches the electromagnet’s _____________.
Current, magnetic poles
Current, vibrations
Poles, circuit
Poles, magnetic poles
To make the armature in an electric motor spin continuously, the ______ of the current must be ______ after each half-rotation.
Direction, stopped
Direction, reversed
Resistance, reduced
Resistance, reversed
The picture shows a coiled wire that carries an electrical current. What do the gray lines (NOT the black coil) represent?
The electric field
Thermal energy
The magnetic field
Light energy
What must be done to use this device for electromagnetic induction?
Move the wire up and down
Attached the disconnected end of the wire to close the circuit
Coil the wire around a screw
Remove the wire from between the magnets
The diagram below shows electromagnetic induction. The solid black line represents a wire. What do the arrows indicated by part A represent?
Solenoid
Current
Electricity
Magnetic field
A _________ is a current-carrying wire with many loops. If a metal bar is placed within the coils of a solenoid, then the metal bar becomes a ___________.
Electromagnet, magnet
Solenoid, magnet
Solenoid, current
Electromagnet, current
If the bar magnet below is cut in half, which answer choice shows the pieces after the magnet has been cut?
How are the magnetic field lines near the south pole of a magnet affected when a second south pole is brought near it?
The field lines bend toward the second south pole
The field lines bend away from the second south pole
The field lines combine with the lines around the second south pole
The field lines overlap with the lines from the second south pole
What is the function of a switch?
source of electrical energy
device that needs electrical energy to operate
something that conducts
manages the flow of current in an electric circuit
What is the name and function of this symbol?
Battery, provides electrical energy
Switch, controls electric current
Switch, measures electric current
Resistor, controls electric current
Which is a disadvantage of series circuits?
Adding more batteries will increase the current.
There is more than one path for charges to flow.
If one bulb goes out, they all go out.
They are very complicated to design and build.
Ohm’s Law states that:
Resistance is equal to voltage divided by current
Voltage is equal to resistance divided by ohms
Current is equal to resistance divided by voltage
Resistance is equal to voltage multiplied by current
If voltage stays the same and resistance doubles, what will happen?
Current will be doubled also because resistance and current are inversely proportional.
Current will be cut in half because resistance and current are inversely proportional.
Current will be cut in half because resistance and current are directly proportional.
Current will be doubled also because resistance and current are directly proportional.
What is the resistance of a clock if it has a current of 0.45 A and runs on a 9.0 V battery?
4.05 Ω
0.05 Ω
20 Ω
2 Ω
Anna measures a circuit at 120 V and 480 Ω. What is the current?
0.25 A
0.25 V
4 A
4V
Which answer choice correctly completes this sentence? “The resistance of a wire depends on its:”
Thickness - thin wires have less resistance than thick wires.
Length - long wires have more resistance than short wires
Temperature - the higher the temperature of a material, the lower its resistance is
Position
To keep a current from passing out of a wire, an electrician might:
Wrap a wire with more wire
Wrap a wire with a conductor
Wrap a wire with a thick plastic coating
Take the insulating coating off of the wire
Voltage is measured in ________ and is also known as _________.
Ohms, current
Watts, current
Volts, potential difference
Volts, current
The strength of electric force between objects is dependent on the amount of charge and the distance between charged objects. Which of these is true?
Charge and strength have an inverse relationship
Charge and distance have a direct relationship
If distance is increased, then electric force decreases because distance and force have a direct relationship
If distance is increased, then electric force decreases because distance and force have an indirect relationship
At which point would the electric force be greatest?
1
2
3
4
Which of the following is an accurate description of how a light microscope works?
It functions exactly like a magnifying glass
The objective lens is what the observer looks through.
Both the objective lens and the eyepiece lens are a convex lens.
It creates a virtual image of the object
Which is NOT a correct description of a laser?
Light created by a laser is different from normal light because it contains one specific wavelength of light
A laser beam is very tight
Laser light is very strong and concentrated.
Laser light is made up of many different colors
Which is NOT a use of lasers?
Cutting through cloth
Performing eye surgery
Scanning barcodes
Transmitting internet signals
Fiber optic strands are:
small and stiff
Small and flexible
Large and stiff
Large and flexible
When light travels through air along straight lines, what happens when it enters water?
It changes direction
It continues along the same lines
It completely stops
To make a convex lens stronger, what should you do?
Increase the focal length
Decrease the focal length
Decrease the distance between the lens and the object you’re viewing
Increase the distance between the lens and the object you’re viewing
Which of the following is an INCORRECT statement about ray diagrams?
For a single lens, only three rays are needed
The three rays are drawn from a single point on the object
Ray diagrams are the same for convex lenses and concave lenses
Ray diagrams always have a ray that goes from the object through the center of the lens
Which of the following is an INCORRECT statement about plane mirrors?
An image is formed by a plane mirror when light bounces off of the mirror and then appears to come from behind the mirror
A plane mirror creates a virtual image.
The images created by a plane mirror can only be the same size as the object.
Images created by a plane mirror are sometimes right-side up and sometimes upside-down.
The diagram below shows the reflection of light from a mirror. The value of x in the diagram is ____ degrees.
40
50
90
180
Which is NOT a true statement about convex mirrors?
A convex mirror is a mirror or lens that curves outward
Convex mirrors form images by bouncing light rays away from a focal point
Images formed by convex mirrors appear to originate from in front of the mirror.
The back of a metal spoon is a convex mirror.
Which type of mirror is described by the three characteristics below?
I. creates an image that is virtual OR real
II. The size of the image is either the same size, smaller, or larger
III. The image is either right-side up OR upside down
Plane
Convex
Concave
Until the 1600s, most scientists believed that light was made up of _______
Particles
Waves
When light bends as it passes from one transparent object to another, the light is ____.
Absorbed
Bounced
Reflected
Refracted
The color of an opaque object depends on the wavelengths of light the object _________
Reflects
Absorbs
Refracts
Allows to pass through it
Which part of the electromagnetic spectrum has the shortest wavelength?
Radio waves
Gamma rays
Ultraviolet light
Visible light
Which statement is true of fluorescent light?
Fluorescence is the emission of light by a substance after it has absorbed energy from electromagnetic waves.
Fluorescence is when gamma rays shine on substances which causes them to give off visible light.
Fluorescence is used in criminal investigations when UV light detects the presence of radioactive substances
Fluorescence is undetectable by the human eye.
Which two animals use echolocation?
Dolphins and butterflies
Dolphins and humans
Bats and dolphins
Bats and humans
What do digital signals turn sounds into?
Zeros and ones
Interference
Analog signals
Radio waves
The steps for how a sound wave is sent through the radio is as follows:
1.Microphones change sound waves to electrical signals
2. _________________ towers convert the electrical signals into radio waves
3.Radios convert radio waves into sound waves
Which word correctly fills in the blank?
Microphone
Radio
Transmitter
electrical
What is the term for the material or substance a wave moves through?
Medium
Rarefaction
Vibration
Solid
Which of the following is true about Waves A and B below?
Wave A has a higher frequency than Wave B.
Wave A has a higher amplitude than Wave B.
Wave A has a lower frequency than Wave B.
Wave A has a lower amplitude than Wave B.
If you wanted a wave to slow down, what would you do?
Decrease temperature
Increase temperature
Change the density of the medium
Bend the wave
What does absorption mean in terms of waves?
When a wave bounces off an object
When a wave bends and scatters when traveling through a small opening
When a wave bounces off of an object
When a wave is taken into an object
What do diffraction and refraction have in common?
They both involve interference.
They both involve wave interactions.
They both involve reflection.
They both involve construction.
Destructive interference is: (choose two)
The same as constructive interference
When the crest of one wave overlaps the crest of another
When two waves traveling along the same medium meet and cancel each other out
When the trough of one wave overlaps with the crest of another, causing the new wave to have less energy than the two original waves
What happens to a light wave as it travels from a solid, to a liquid, to a gas?
Slows down
Increases in wavelength
Decreases in wavelength
Speeds up
Fill in the blank: A wave is any disturbance that carries _______ from one place to another.
Energy
Vibration
Electricity
Particles
Which of the following is NOT a mechanical wave?
Atomic bomb shock waves that superheat air particles nearby
Sound waves used to do an ultrasound
Sunlight traveling through space to earth
A crowd doing the wave at a sporting event
Which is an example of a longitudinal wave?
A crowd doing the wave at a sporting event
Sound waves used to do an ultrasound
Sunlight traveling to Earth through space
Electromagnetic waves
Radiation moves from _______ to ________.
Cooler objects, warm objects
Warm objects, cooler objects
Larger objects, smaller objects
Warm objects, objects of the same temperature
Sunlight moves to the Earth through space via ________.
Moving particles
Mechanical waves
A medium
Electromagnetic waves
Based on this THERMOGRAM below, what would you say about this house?
The windows are not energy efficient
The windows are energy efficient
The roof is not energy efficient
The roof takes in a lot of solar radiation
____________ is driven by temperature differences with a fluid.
Convection
Radiation
Conduction
Electromagnetic radiation
Convection currents occur in all of the following EXCEPT:
Water in a pot that is being heated on the stove
Snowdrift on a shady mountainside
The air above a wildfire
A lava lamp
Convection occurs in:
Fluids
Gases only
Liquids only
Solids, liquids, and gases
Conduction is the transfer of thermal energy or electric charge between two objects of _________ by ____________
different temperatures, indirect contact
the same temperature, indirect contact
different temperatures, direct contact
the same temperature, direct contact
What is happening at points 2 and 3?
Conduction
Convection
Radiation
Indirect contact
Nuclear reactions in a reactor produce a lot of thermal energy. That energy then flows and warms up water, which boils and produces steam. The steam then turns turbines that generate electricity. Which statement below can be made about the production of electricity in a nuclear reactor?
The steam produces heat.
The water produces heat.
Heat flows in the form of electricity.
Heat flows from the reactor to the water.
Which of the following is NOT one of the three factors affecting heat transfer?
the amount of time of contact
the amount of area of the contact
the specific heat of the substances
The state of matter of the substances
_________ energy is characterized by motion.
Friction
Potential
Kinetic
Stored
To test the boiling point of water, Delia uses a _______ thermometer to show the water begins to boil at 100 degrees.
Fahrenheit
Kelvin
Celsius
Which of these indicates that a liquid has absorbed thermal energy?
The liquid decreases in temperature and its particles gain kinetic energy
The liquid decreases in temperature and its particles lose kinetic energy
The liquid increases in temperature and its particles gain kinetic energy
The liquid increases in temperature and it’s particles lose kinetic energy
Carbon deposits like coal, oil & gas are used to produce energy on Earth. However, _____ energy is the source of the most energy.
Wind
Falling water
Solar
Earth’s core
When striking a match __________ energy is transformed into radiant and ________energy.
Kinetic, thermal
Thermal, kinetic
Light, heat
Passive, mechanical
As a person pushes a crate across the floor, the energy from their moving arm is transferred to the box, the box and the floor become warm. What does NOT happen to the energy?
It is increased
It is decreased
It is created
All Of the above
Potential energy is ________ energy and most affected by______
Active, Velocity
Stored, Height
Stored, Friction
Active, Height
Kinetic energy is _____ energy and most affected by __________.
Active, Velocity
Stored, Height
Stored, Friction
Active, Height
Sean bounce passes the basketball to Omar. Sean knows the acceleration due to gravity. What other factors are needed to calculate the ball’s potential energy?
Height the ball reaches
Mass of the ball
Shape of the ball
Both A & B
Kinetic and Potential energies are ____________ proportional- when Kinetic energy goes up, Potential energy goes _____________.
Inversely, up
Directly, up
Inversely, down
Directly, up
Unit(s) of measure for energy are NOT
Watt
Joules
Newtons
A & C
When a rubber band is stretched & released, energy changes from ______ to ______ due to work being done.
Potential, kinetic
Kinetic, potential
Potential, stored
Stored, Potential
A wedge is a simple machine that might be used to...
Lift a heavy object
Split an object apart
Counterbalance an object at its fulcrum
Rotate an object along it’s ridges or threads
The mechanical advantage of a 2 pulley system is...
(think about the MA for 1 pulley!)
1.0
2.0
1.5
3.0
Label this simple machine found in the body
I. Fulcrum II: Lever III: Load
I. Lever II: Load III: Wedge
I. Load II: Lever III: Fulcrum
I. Wedge II: Load III: Fulcrum
A bicycle moves a load over a distance. The simple machines that make up a bicycle are
Wheel & Axle, Pulley, Wedge
Wheel & Axle, Fulcrum, Lever
Wheel & Axle, Pulley, Wedge
Load, Pulley, Wedge
Delivery drivers often use ramps when moving heavy boxes upstairs. A ramp makes doing work easier as it allows a________ force applied over a _______ distance.
Larger, shorter
Larger, longer
Smaller, shorter
Smaller, longer
Simple machines do not reduce the work required, but ________ the force applied over a _______ distance.
Amplify, greater
Reduce, greater
Amplify, shorter
Reduce, shorter
The ratio of ______ to _______ force of a machine is the mechanical advantage.
Potential, kinetic
Work, kinetic
Simple, compound
Output, input
Rosita lifts a toolbox, carries across the garage & places it on a high shelf. When is she doing work?
Rosita does no work on the toolbox
Rosita does work as she picks it up and lifts it to the shelf
Rosita only does work as she picks it up
Rosita only does work as she places it on the shelf
A powered winch on the tow truck is used to pull a truck out of the mud. The winch uses a 100 W motor. If the motor is used for 60 sec, how much work did it do? (Power: P=W/t)
6,000 J
600 J
160 J
1.6 J
