Conservation Of Energy
(243).jpg "Conservation Of Energy")
This is a quick quiz to see what you understood from this week. Try not to stress- you get 5 points just for taking it! The other points you will earn by answering the questions below. The most important thing you need to do is write down what you picked, why you picked it, and, if you get it wrong, what the correct answer is. Bring this paper to class on Monday.
- 1.The law of conservation of energy states...
- A.
It is important for any civilization to conserve its energy.
- B.
Energy that is not actively conserved will be lost forever.
- C.
Energy cannot be created or destroyed, only transformed.
- 2.Describe your energy at the top of a roller coaster hill, just before you start moving into the big drop. You are currently perfectly still (aside from the screaming).
- A.
Because you aren't moving, you have no energy.
- B.
You have potential energy.
- C.
You have kinetic energy.
- D.
You have both kinetic energy and potential energy.
- 3.In class this week, you played with a generator (this was the gun-looking object with the crank on one end). Why were you able to light up the lightbulb when you turned the crank?
- A.
The magnet inside made the energy and passed it to the light bulb.
- B.
The energy you used to turn the crank was converted into electricity.
- C.
By turning the crank, you turned on a battery inside the generator.
- 4.I stretch a rubberband and fling it at across the room. When does the rubber band have energy?
- A.
Only when its flying across the room.
- B.
Only when it was stretched tight.
- C.
Both when its stretched tight and when its flying across the room.
- D.
There is not enough information to answer this question.
- 5.Where does electricity in your house come from (the type that comes on when you flip a switch)?
- A.
Coal and oil are burned to heat up wires, which makes energy flow through wires.
- B.
Humans mine rocks that are naturally magnetic and electric. These are made into large batteries.
- C.
Humans heat up water and create steam in order to spin magnets near wires.
- D.
Earth's magnetic field is used to create electricity.
- E.
No one knows for sure where electricity comes from.
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