Show:
Energy Resources
Electricity
Magnetism
100
What is the difference between a renewable and a non-renewable resource?
A Non-Renewable resource will eventually run out (fossil fuels, nuclear) and a Renewable resource can forever be replenished (solar, wind, hydro)
100
Electrons have a _________ charge.
Negative
100
Just like gravity and electric charges; magnetism is an _________ force.
Invisible
200
Name one advantage of nuclear energy.
Lots of energy is a small amount of fuel, no carbon emissions/air pollution.
200
What is the difference between a conductor and an insulator in terms of electricity?
A conductor allow electrons to move freely through them, insulators prohibit the movement of electrons.
200
What will happen if you place the north end of a magnet near the south end of another magnet?
They will attract each other.
300
Name two disadvantages of fossil fuels.
Non-renewable, creates air pollution, political implications (war, terrorism).
300
Describe what was happening to the electrons during the balloon and cereal demonstration.
Electrons were moving from your hair to the balloon, giving it a negative charge. This negatively charged balloon attracted the positively charged cereal.
300
Why does a compass point north?
The magnet in the compass is reacting to the magnetic field of the earth.
400
Describe the basic process of how fossil fuels were formed.
Millions of years ago, living organisms (under particular conditions) died and were covered by layers and layers of soil. Eventually, the pressure and temperature transformed this organic material into fossil fuels (coal, oil, gas).
400
Describe how lightning forms.
Inside the clouds, water drops are trading electrons back and forth. This turbulence (under the right conditions) can result in a build up of negative charges in one spot. Eventually, there are too many electrons in one spot and they discharge to a positive part of the cloud or ground in the form of lightning.
400
Explain the domain theory using a picture to help you.
The electrons in the material align so that the domains are all lined up and pointing the same direction.
500
Describe how a hydroelectric dam converts mechanical energy into electrical energy.
The force of the water turns a turbine. This turbine turns a series magnets inside a copper wire (generator), thus creating electricity.
500
Build a simple and parallel circuit, describe the advantages of a parallel circuit.
Parallel circuits allow for the full brightness of the bulbs, and if one goes out, the rest of the bulbs stay lit.
500
If an electric current can create a magnetic field, can a magnetic field create an electric current? Explain.
Yes! That is what happens in a generator. A magnetic field spinning inside a copper coil will create an electric current. In fact, that is how most of our electrical energy is formed.