Static Electricity
Circuits
Magnetic Fields
Electromagnets
Generating Electricity
100
What is the tiny particle that makes up electricity?
Electrons make up electricity.
100
When static electricity moves to another object it is called an electric ______________.
An electric current.
100
Give an example of the type of material a magnet attracts.
Metals such as iron and steel
100
To build an electromagnet you need a coil of wire wrapped around an iron core and what else?
A source of electrical energy.
100
Sliding a magnet back and forth inside a coiled wire generates what?
Electricity
200
What charge do electrons have? Positive, negative, or neutral.
Electrons have a negative charge.
200
In order for a an electric current to flow, a circuit must be open or closed?
Electricity flows through closed circuits.
200
How many poles do all magnets have?
Two poles, a North and a South.
200
Name three ways an electromagnet's power can be increased.
1. Increasing the amount of current running through the wire. 2.Increasing the number of coils. 3. Increase the size of the magnetic core.
200
What can we increase to make a generator make more electricity?
We can increase the number of coils in the wire. We can increase how fast the magnets moves. We can increase the power of the magnets.
300
What does the word "static" mean?
Static means not moving.
300
The name for a material which allows an electric charge to easily move through it is called a/an _________.
Conductor
300
Where is a magnet the strongest?
Magnets are strongest at the poles.
300
Name a household object which use electromagnets to function.
Speakers, T.V.'s, Cars, Vacuum Cleaners, Power Tools, Doorbells, headphones, telephones, CD players, microwaves
300
Most homes, schools, and businesses today get their energy from these.
Generators
400
How will two objects with opposite electric charges react to one another?
Opposite charges will attract.
400
A circuit with a battery, two lights, and a motor but only one path for electricity to flow is called a ________
series circuit
400
What is the largest magnet in the world?
Planet Earth
400
A motor turns electrical energy into magnetic energy then into what type of energy?
A motor turns electrical energy into magnetic energy and then into mechanical energy.
400
What scientist discovered how to generate electricity but did not share his invention with other scientists?
The American Joseph Henry
500
What causes matter to become charged with static electricity?
Matter gains or loses electrons causing an imbalance in positive and negative charges.
500
What type of circuit is found in houses, schools, and offices?
Parallel Circuits
500
This tool aligns north-south so that one end always points to Earth's magnetic north pole and the other end points to Earth's magnetic south pole.
A compass
500
What is one advantage electromagnets have over regular magnets?
Electromagnets can be turned off and on, Electromagnets can change their strength.
500
Generators need mechanical energy to create electricity. Name four different ways to power a electrical generator.
1. Wind 2. Water power 3. Geothermal energy 4. Nuclear energy 5. Hamsters running on tiny wheels.
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