Show:
Vocabulary
Electricity
Energy
Magnetism
Hodge Podge
100
What is an object that attracts iron?
A magnet
100
What is a path that has more than one way an electric current can flow?
Parallel Circuit
100
What is another name for the energy of motion?
Kinetic Energy
100
Every magnet has two poles, what are these two poles called?
North and South Pole
100
What is a material that does not let current electricity move through it easily called?
Insulator
200
What is a temporary magnet?
electromagnet
200
What is the name of the path that has only one way for the current to flow?
Series Circuit
200
What is another name for the "energy of position"?
Potential Energy
200
Why does a magnet hold paper to your refrigerator?
Magnetic forces pass from the magnet, through the papers, to the refrigerator.
200
What is a stream of electrons moving through a copper wire called?
current electricity
300
What is a machine that produces electric current?
generator
300
Which of the following is a good conductor of electricity: plastic, rubber, glass, copper?
copper
300
What is stored in the bonds that hold compounds together?
Chemical Energy
300
What two items are needed to build a small electric generator (electromagnet)?
coil of wire and magnet
300
What type of power is kinetic energy of falling water changed into electrical energy?
Hydroelectric Power
400
What is an electric charge that builds up in an object?
static electricity
400
Offices, homes, and factories use about the same amount of electricity. What fraction of electricity do homes use?
1/3
400
What are four sources of energy?
solar, hydroelectric, geothermal, wind
400
Why wouldn't a permanent magnet be useful for picking up cars in a junkyard?
Once a car was picked up by the magnet, there would be no easy way to remove the car from the magnet. An electromagnet is temporary and would be a better choice.
400
Explain how lightning is a form of static electricity.
Ice crystals in a thunder cloud rub together, creating a negative charge and the ground loses negative charge, so it is left with a positive charge. Negative charge then moves from the clouds to the ground and lightening is seen.
500
What is a material that lets electricity travel through it easily?
conductor
500
Explain why only one light on a string of Christmas tree lights can be out while the rest are working.
It is a parallel circuit. There are other paths that electricity can flow through to complete a circuit.
500
List two sources of chemical energy.
fossil fuel, battery
500
Suppose you are testing the strength of an electromagnet. You change the number of loops of wire to see how many paper clips the electromagnet can pick up. What two headings would you use to record the data?
"Number of Loops" and "Paperclips picked up"
500
Why can some batteries be recharged?
In a battery, electrons move from one end of the battery through a toy or device to the other end of the battery. The direction of the electron flow can be reversed to recharge the battery.