How does matter become charged?
_________ happens when positive and negative charges no longer balance.
Static electricity
Circuits in your home, school, and other buildings are _______ circuits.
Series or parallel
_______ is a force that acts on moving electric charge and magnetic materials that are near a magnet.
Magnetism
Can you change the strength of an electromagnet?
Yes or no
Yes.
You can make an electromagnet stronger by increasing the amount of current running through the wire.
Who were the two scientist who were pioneers in electricity?
Michael Faraday and Joseph Henry
Give two examples of static electricity.
lighting and balloons
An electric charge in motion is called an _____________.
electrical current
The ______ goes out in all directions.
magnetic field
An ________ is a coil of wire with many loops through which an electric current passes.
electromagnet
The power of magnetism can be transformed into the power of electricity.
True or False
True
What happens to two objects that have opposite charges?
They will attract each other.
____________ means the material does not allow electric charges to flow through it easily.
Resistance
If you break a magnet into two pieces, what happens to its magnetic poles?
You will have two magnets, each with its own north-seeking pole and south-seeking pole.
Earphones turn electro current into ______ waves.
(hint: music and noise)
sound
A wind turbine changes the energy of the blowing wind into _______.
electricity
What effect will a charged object have on an object with the opposite charge?
It will attract
Copper wire is not a good conductor of electricity?
True or False
False
The Earth is not magnetic.
True or False.
False.
The Earth is like a giant magnet surrounded by a huge magnetic field.
Hans Christian Oersted showed how electric current flowed through a wire.
True or False
True
What is a generator?
A generator is a machine that creates electric energy by turning coils of wire around powerful magnets.
What happens to two objects that have the same charge? Will they push away, or repel, each other?
They will repel each other.
In a parallel circuit, a missing or burnt-out bulb does not open the circuit.
Pick the best answer:
A.) The other bulbs will stay lit.
B.) The other bulbs will not stay lit.
A.) The other bulbs will stay lit.
At certain times of the year, there is a light show in the sky called _______.
The Northern Lights
An electromagnet has what kind of poles?
North and South Pole
Michael Faraday invent a machine that used magnets to transform motion into an electric current. By turning a crank, he was able to produce electrical energy.
What was his invention called?
(hint: starts with a d____)
(hint: not today is used for emergencies for light)
dynamo