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Worksheets2. Elec, Mag, Energy Resource TEST AND REVIEW
Total questions: 92
Worksheet time: 1hrs 2mins
The brushes in an electric motor
the split rings that rotate in a motor
the coil that create the electromagnetic field
Are spring loaded connectors that carry electricity to the rotor by brushing against the commutator as it rotates
the magnets surrounding the rotor
The commutator is
The spring-loaded connections that keep contact with the stator
the split ring that swaps the coils ends between positive and negative as the coil rotates
the magnets that cause the electromagnet to attract and repulse
the coil that is also known as the armature
The greater the number of windings (the number of times it is wrapped around) in an electromagnet's coil
the stronger the magnet is
the less the magnet will pick up
the more current it takes to create the electromagnet
the slower the compass needle moves to the wire
What is magnetism?
the distance between two magnets
the force
the force where objects are attracted to or repelled from one another
the study of magnets
To push or pull is called...
a force
iron
induced magnetism
temporary magnet
When two magnets pull toward one another, we say they
attract
repel
force
magnetize
When two magnets pull away from each other, we say they
attract
repel
force
magnetize
Why do magnets stick to steel?
They are temporary magnets.
They have induced magnetism.
It is mostly made of magnetite.
It is mostly made of iron.
When a magnet comes close to or touches a piece of iron, the object becomes
a temporary magnetic
induced magnetism
magnetic force
iron
What happens when a steel nail behaves like a magnet when it is touching a permanent magnet?
magnetism is induced
it becomes iron
nothing is attracted to it
it repels
Select all that would stick to a magnet.
magnetite
penny
paperclip
steel nail
The greater the distance between two magnets
the stronger the force
the weaker the force
What is the rock that sticks to magnets?
granite
calcite
feldspar
magnetite
The needle on a compass will automatically point to another magnet because
it is made of iron
it is steel
the compass is a magnet
Every magnet has two poles.
True
False
When you hold two magnets, you can feel the magnets pulling toward each other or pushing away from each other.
True
False
When two north poles are brought near each other they attract.
True
False
When two south pole magnets are brought near each other they repel.
True
False
When a north and a south pole come together they attract.
True
False
Select all the variables that affected the number of washers it took to break the force of attraction.
The force in which the washers were placed in the cup.
The strength of the magnets.
If the washers were stacked or scattered
The strength of the washers.
What objects can help us detect a magnetic field?
wood
yarn
plastic
iron
Select all that would not attract to a magnet.
rubber band
craft stick
straw
washer
Select all the magnetic force can act through
air
book
cardboard
plastic
cloth
Which statement is true about coal and natural gas?
Both are renewable resources
Both require wind in order to work
Both lead to greenhouse gases and climate change
Neither one causes global warming
Which of the following is a disadvantage of fossil fuels?
Not easily available
causes pollution when burned
only available at certain times
creates long lasting waste
A group of non-renewable resources, called ______________, include coal, oil, and natural gas.
Fossils
Energy
Resources
Fossil fuels
We can get energy from coal by...
Breaking it down
Digging it up
Burning it
Rubbing it together
What is geothermal energy?
A power plant.
Heat energy generated and stored in the Earth.
Nuclear Energy
A nonrenewable resource
5. The Earth provides humans with an unlimited amount of fossil fuels. They are considered renewable.
True
False
This is the cleanest burning of the fossil fuels:
Natural Gas
Coal
Petroleum
Shale
What is a biofuel?
A liquid extracted from the waste of living creatures or from plants
The sun - whch is the source of energy for plants
Energy provided by the physical efforts of people or animals
Fuel generated from genetically modified organisms
of the most common biofuels today, one is often added to gasoline. Which one is this?
Corn Syrup
Ethanol
Biodiesel
Supranol
