Energy 1
What is the main source of energy from the sun?
Light
What will happen in the following situations?
-positive and positive
-negative and negative
-positive and negative
-negative and positive
-repel
-repel
-attract
-attract
What is a good insulator?
Answers may vary
How do you know a circuit is closed?
The switch would be in the on position.
A light bulb will be turned on.
What energy transformation takes places when someone makes coffee in an electric coffee pot?
Electrical to thermal
What two forms of energy are produced when sawing a table?
Mechanical to heat OR potential to kinetic
When you rub your head with a balloon, why does your hair stand up as you pull the balloon away?
Static electricity causes the hair to be attracted to the opposite charges on the balloon.
What material is a good conductor?
Answers may vary
How do you know a circuit is open?
The switch is in the off position.
A light bulb will not be turned on.
What type of energy occurs when someone is boiling a pot of water on the stove?
ELectrical to thermal
What sound would you hear when there is a high pitch?
Screaming
When you put two batteries into a flashlight, what would make the flashlight NOT work?
The batteries negatively charged sides are touching one another.
Any material that does not allow the flow of heat or electricity through it.
What do you need to make a light bulb light in a closed circuit?
battery, wires, lightbulb
When you hear someone talking on the television, what type of energy transformation occurs?
Electrical to sound
What two types of energy are used when riding a bike?
Potential and Kinetic
Attract or repel?
-opposite charges
-like charges
-attract
-repel
Define a conductor.
Any material that allows the flow of heat or electricity through it.
If you make a circuit with a battery, wires, iron nail, and a light bulb, will the light bulb light?
Yes. The iron nail is a conductor and will allow electricity to flow through it.
Describe the energy transformation that occurs in a hair dryer (3).
Electrical to mechanical to sound/heat
At the fair, bumper car A is not moving. Bumper car B bumps into Bumper car A, making it move. Why does Bumper car A move?
Transfer of Mechanical Energy
What types of charges affect objects with NO CHARGE (neutral)
Positive charges
If you make a circuit with a battery, wires, rubber, and a light bulb, will the light bulb light?
No. Rubber is an insulator and does not allow electricity to flow through it.
When you make a circuit and light a bulb, what type of transformation occurs?
What energy transformation occurs when you listen to music on an iPhone?