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WorksheetsPhysics Review
Total questions: 89
Worksheet time: 1hrs 29mins
on Earth, an object's mass is measured as
(a)
the gravitational pull between two objects is stronger when there is (a) distance between them
(a) friction happens when an object moves through the air or water
Light can behave as both a ______ and a _______.
ray, beam
wave, particle
natural source, unnatural source
refraction, reflection
____________________is the process of creating an electric current with a magnetic field
protons
circuit
electromagnetic conduction
electric current
______________ is responsible for discovering the principles of electromagnetic induction.
Faraday
Einstein
Newton
Bernoulli
devices that increase or decrease voltage of electricity are called
generators
magnets
transformers
electrons
Devices that change kinetic energy to electrical energy. They produce electricity in power plants.
transformers
generators
work forces
electric current
Name for the electrical force that would drive an electric current between those points.
Meters
Newtons
Voltage
Joules
the voltage created by a battery or by a changing magnetic field.
oil
gravity
electromotive force
filament
When an electric current runs through a wire, a magnetic field is induced_______________
around the wire
under the wire
through the wire
What is the relationship between electricity and magnetism?
electricity is a form of magnetism
magnetism is a form of electricity
they are two forms of the same force
You're going camping, and you need a source of electric current. So, you buy a gasoline-powered:
motor
generator
inducer
electromagnet
What do you need to build a working electric motor?
an extremely large magnet
fuel that can be burned
a wire that is at least 5 meters long
a source of electricity
What might happen if transformers didn't exist?
the electricity in your home might have a very high voltage
electricity couldn't be distributed through power lines through people's homes
electricity could not be created at power plants
the direction of the electric current might switch back and forth
How would you reverse the direction of the current flowing through the coil in Faraday's experiment?
use a magnet of opposite polarity
move the magnet through the coil faster
reverse the magnet's direction
use a larger magnet
___________________ is an invisible force caused by the properties of certain metals.
force
electrons
magnetism
attraction
if you take a loop of wire and move it through a magnetic field you generate an _____________________.
electric current
force field
bubble
refractive lens
Two south poles of a different magnets will _____________ each other
attract
love
repel
cover
a south and a north pole of two magnets will ______________ each other
like
attract
repel
entertain
A device used for measuring electric current in amperes
scale
voltmeter
ammeter
an instrument for measuring electric potential in volts
book
scale
ammeter
voltmeter
every electron has an invisible area around it called a.....
magic field
magnetic field
party place
electron house
a magnet's __________________ have a north and south end
equator
poles
habitats
faces
a magnetic (a) causes a pull on the atoms in a metal
if a wire is wrapped around an iron bar it is called an __________________.
magenta
purple
electromagnet
fragment
_________________ with large, powerful magnets are used to produce electricity.
hydroelectric plants
germination
generators
adaptors
The electricity we use every day is produced at _____________________.
plantains
Pangea
hydroplanes
power plants
Power plants make 1. AC or 2. DC?
AC
DC
The steam produced by power plants spins large blades in a machine called a ______________.
solar panel
plane
automobile
turbine
currents leaving a power plant have to pass through a __________________ before being used.
building
transformer
hotel
Alaska
A transformer greatly increases the ___________________of a current
elasticity
voltage
happiness
sunshine
a second transformer ________________________the voltage before it reaches homes and businesses.
incfreases
decreases
breaks up
neutralizes
_______________ is when an electric current travels in one direction.
direct
indirect
alternating
an electric current in which electrons move rapidly back and forth is called ___________________current.
direct
indirect
alternating
rhythm nation
a closed path along which a an electric current travels is a _______________.
electricity bus
electron slide
banana
circuit
materials, especially metals that transmit electricity are called _________________.
transmitters
insulators
conductors
metalloids
the property of matter that causes it to be electrically positive or negative, casting losing or gaining electrons.
positivity
negativity
change
charge
__________________ electricity is caused by a build up of negative charges in one place and negative charges in another place.
current
circuit
static
shocking
a measure of the rate at which electricity is being used
amp
ampere
watt
volt
a measure of the amount of push that gets an electric current moving.
volt
amp
ampere
watt
particles in the nucleus of an atom that have no charge
proton
electron
neutron
quark
most magnets are made up of _____________
gold
silver
magnesium
iron
the pull of a magnet works in lines of ________________
force
friction
north
south
true or false: usually less expensive jewelry is magnetic.
true
false
magnets are made of _______________
plastic
wool
liquids
metal
what does a magnetic field look like?
a rainbow
it's invisible
black and white
none of these
How are the magnetic domains of a magnet different from the domains of an ordinary piece of metal?
In a magnet, the domains all point in the same direction; in an ordinary piece of metal, they're all jumbled up.
In a magnet, the domains all point toward the north pole; in an ordinary piece of metal, they all point to the south pole.
In a magnet, the domains are very strong; in an ordinary piece of metal, they're very weak.
A magnet contains magnetic domains; an ordinary piece of metal does not
What can you infer about magnetic domains from the fact that they are arrangements of atoms?
The individual domains are extremely small.
The individual domains are extremely large.
The individual domains attract one another.
The individual domains repel one another.
Why are the magnetic domains of this paperclip lined up?
Because the paperclip has acquired a static charge.
Because a paperclip is a type of electromagnet.
Because paperclips are permanent magnets.
Because the paperclip has been exposed to a magnetic field.
Which of the following metals can be magnetized?
lead
iron
copper
silver
How can you create a magnetic field?
By stringing many magnets together
By plugging a refrigerator magnet into an electric socket
By rubbing a piece of glass against a piece of wool
By running a current through a wire
Which of the following statements is true?
A compass is affected by the earth's magnetic field.
An object's magnetic field gets weaker as you move closer to it.
Once a piece of metal becomes magnetized, it stays magnetized.
The earth's magnetic north pole is located at the geographical north pole.
Where might you find an electromagnet?
In a fluorescent light bulb
Hanging on your refrigerator door
In an electric motor
In pieces of rock called magnetite
What can you conclude about electricity and magnetism?
They have nothing to do with one another.
they cannot be controlled
they are related
they have no practical applications
If you have an electromagnet, how can you make its magnetic field stronger?
Increase the size of the magnetic domains
Increase the strength of the electrical current
Increase the length of the wire
Increase the distance between the north and south poles
metals that have magnetism are :
iron, cobalt, nickel
gold, silver, potassium
iron, calcium, copper
iron, cobalt, platinum
Which of the following is a true statement?
Hans Orsted and Michael Faraday competed to be the first scientist to describe electromagnetic induction
Orsted and Faraday were colleagues who worked together to discover electromagnetic induction
Orsted stole Faraday's ideas about electromagnetic induction, leading to controversy
Faraday built on Orsted's discoveries to describe electromagnetic induction
When an electric current runs through a wire, a magnetic field is induced …
Around the wire
Parallel to the wire
under the wire
through the wire
Two electromagnets contain the same types of magnets and wires. But the magnet in the first moves much faster than the second. Therefore:
The first electromagnet has a more powerful current than the second
The first electromagnet has a less powerful current than the second
The currents in the two electromagnets run in opposite directions
The current in the first electromagnet moves faster than the current in the second electromagnet
What do you need to build a working electric motor?
An extremely large magnet
Fuel that can be burned
A wire that's at least 5 meters long
a source of electricity
What might happen if transformers didn't exist?
The electricity in your house might have an extremely high voltage
Electricity could not be distributed through power lines to people's homes
Electricity could not be created at power plants
The direction of the electric current in your home might switch back and forth
How would you reverse the direction of the current flowing through the coil in Faraday's experiment?
Use a magnet of opposite polarity
Move the magnet through the coil faster
Reverse the magnet's direction
Use a larger magnet
What is the major difference between static electricity and current electricity?
Current electricity involves a continuous flow of neutrons; static electricity is a sudden transfer of protons.
Current electricity can be deadly; static electricity is almost always safe.
In current electricity, there's a single transfer of electrons; in static electricity, there's a steady flow of electrons.
Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons.
What is static electricity caused by?
A balance of power.
A balance of positive and negative charges.
An imbalance of positive and negative charges.
An imbalance of protons and neutrons.
If a substance has an excess number of electrons on its surface, what type of charge does it have?
a positive charge
a negative charge
a neutral charge
a nuclear charge
Which of the following atoms is considered neutral?
An atom with five protons, six neutrons, and five electrons
An atom with five protons, five neutrons, and six electrons
An atom with six protons, five neutrons, and five electrons
An atom with six protons, six neutrons, and five electrons
How are electrons different from protons and neutrons?
Protons and neutrons are negatively charged; electrons are positively charged.
Protons and neutrons exist inside atomic nuclei; electrons orbit atomic nuclei.
Electrons exist inside atomic nuclei; protons and neutrons orbit atomic nuclei.
Protons and neutrons are positively charged; electrons have no charge.
What can you infer about any object that gives you a static shock when you touch it?
It's a conductor.
It's an insulator.
It's negatively charged.
It's positively charged.
What happens when you touch a metal doorknob after rubbing your shoes on the carpet?
The doorknob sends a burst of electric current into your body.
Millions of electrons go from your finger into the doorknob.
The doorknob sends millions of electrons into your finger.
Your finger becomes negatively charged.
Lightning is a form of static electricity. What can you infer about what happens when lightning strikes the ground?
Protons and neutrons are transferred from the clouds to the ground.
The ground becomes negatively charged.
Electrons are transferred from the clouds to the ground.
An electric current is established between the clouds and the ground.
Energy is best described as:
The sum total of an object’s electrons
A property of matter
An unstable chemical compound
The temperature of a given object
What is the most effective way to increase the potential energy of a baseball?
cut it in half
spray it with water
lift it higher
throw it to a friend
Potential is to kinetic as saving is to ______.
spending
investing
borrowing
sharing
Why does it take so much energy to keep the electrons of an atom close together?
The nucleus is negatively charged
Like charges repel each other
Electrons get bigger as the distance between them increases
They contain powerful electrolytes
What do batteries create that allows them to provide a power supply?
a current
a magnetic field
radioactive decay
a static shock
A battery loses the ability to provide energy when:
The device it's powering is turned off
Its electrolyte starts to dissolve
It can no longer create chemical reactions
Electrons are pushed into the anode
What effect will the north pole of one magnet have on the north pole of another magnet?
repulsive
attractive
comabative
no effect
Why are paperclips attracted to magnets?
the contain silver
the contain aluminum
they contain iron
they contain tin
How do electromagnets differ from regular magnets?
they can be turned on and off
they can be turned on only
they can be turned off only
To change the polarity of an electromagnet, you would:
Reverse the current's direction
Reverse the direction in which the coil is wound
Turn the battery, or other power source, upside-down
Remove the iron core from within the coil of wire
What is energy? Choose the best answer.
Anything that radiates light or heat.
Anything that travels in the form of a wave.
Any object in motion.
Anything that makes matter move or change.
Which of these objects has kinetic energy?
A ball moving through the air.
A ball sitting on a table.
A ball buried underground.
A ball sitting on the edge of a cliff.
What is the difference between kinetic energy and potential energy?
Potential energy is the energy of objects at rest; kinetic energy is the energy of objects in motion.
Kinetic energy is the energy of objects at rest; potential energy is the energy of objects in motion.
Potential energy has to do with chemistry; kinetic energy has to do with physics.
Kinetic energy has to do with chemistry; potential energy has to do with physics.
Which of the following objects has the most potential energy?
A ball sitting on a table.
A ball resting on the ground.
A ball sitting on a mountaintop.
A ball that's been thrown into the air.
Which of the following terms is synonymous with potential energy?
Stored energy
Motion energy
Light energy
Kinetic energy
What would happen if you didn't have chemical energy in your body? Choose the best answer.
You wouldn't be able to think.
You wouldn't be able to move.
You wouldn't be able to sleep.
You wouldn't be able to sit.
What do wind and moving water have in common?
They both have mechanical energy.
They both have chemical energy.
They both have light energy.
They both have nuclear energy.
How is nuclear energy released?
By burning fuel
By moving turbines
By chemicals mixing
By atoms fusing together or splitting apart
