Energy is a concept that describes work or change.
100
What does it mean to attract?
To attract means to pull toward one another.
100
What is a circuit?
A circuit is a path that allows electricity to flow.
100
What is a compass?
A compass is a tool that uses a magnetic needle to indicate direction on the earth's surface by pointing toward the north.
100
How does rubbing your hands together keep them warm?
Heat is produced through the friction of rubbing your hands together.
200
Food energy is an example of what type of energy?
Food energy is an example of chemical energy.
200
What does it mean to repel?
To repel is to push away from one another.
200
Name the three parts of an electrical circuit.
The three parts of an electrical circuit are the source, path and load.
200
If you tied fishing line around an unmarked bar magnet and held it out in front of you, what would you expect to observe?
The magnet would swing around and eventually the north seeking pole of the magnet would point toward the north.
200
Name an experiment that demonstrates how magnetism is created in an electrical circuit.
We created an electromagnet when we coiled wire around an iron nail and attached the wires to a battery. When the circuit was complete, the nail became an electromagnet and attracted the paper clips. When we disconnected the wires, the electrical current stopped and the paper clips fell.
300
What kind of energy makes a popcorn popper operate (work)?
Electrical energy makes the popcorn popper work because electrical current is used to heat the air and run the fan.
300
Where is a magnet the strongest?
A magnet is strongest at the poles.
300
What does the path do in an electrical circuit?
The path carries the electricity from the source to the load and back again.
300
What is a pole?
The pole is the place on a magnet where the magnetic effect is strongest. The two ends of a bar magnet are its poles.
300
What materials are attracted to a magnet?
SOME metals are attracted to magnets.
400
What kind of energy is used to make butter melt in a pan on a stove?
Heat energy makes butter melt in a pan on the stove.
400
If you place a magnet next to a steel fork and a plastic fork, what would you expect to observe and why?
You would expect to see the steel fork attract to the magnet because steel is attracted to magnets.
400
Which materials are good conductors of electricity?
Metals are good conductors of electricity.
400
Give an example of an object that uses a switch.
Hair dryers, lights, curling irons, toasters, coffee pots, etc. all use switches.
400
Why do the wires get hot when constructing a simple circuit?
Electrical energy flowing through the wire produces heat energy.
500
A battery is an example of what kind of energy?
A battery uses chemical energy.
500
You are playing in the sand with a magnet. You notice that some of the grains of sand stick to the magnet but many do not. Why do you think this happens?
It happens because some sand grains contain metals that attract to the magnet.
500
What is the load and give an example.
The load is the object that uses electricity. A light bulb, clock, radio, etc. are all examples of a load.
500
Explain how a switch works in an electrical circuit.
A switch stops the flow of energy by creating a gap in the path.
500
If you place a black balloon and a white balloon under a light source, which balloon would get warmer and why does this happen?
The black balloon would get warmer because the black balloon absorbs more light energy that is transferred to heat energy.