Transcript Magnet and Energy

Magnet and Energy
Test review answers
1. Describe the 5 types of
energy.
Mechanical- motion
 Thermal- heat
 Electrical
 Electromagnetic- light/waves
 Chemical- reaction- make
something new (burning) (eating)
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2. Describe what happens at
the poles of magnets.
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Poles are the strongest part
N repel N
S repel S
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N attract S
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3. What types of items are
magnetic?
Iron,
Nickel, cobalt
(steel contains Iron)
4.
Describe electromagnets. Include the parts and
advantages to using one. Describe ways to change the
strength of electromagnets.
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uses electricity to
make magnetism
battery, wire(coils),
steel nail/bolt
Advantage- turn off
and on
Change the
strength- more
coils***
5. What is the difference between Renewable and
Non-renewable resources? Give examples of each.
Renewable- get more of it- solar,
biomass, wind, geothermal,
Hydrogen, hydroelectric
 Nonrenewable- can not get more of
it- nuclear & fossil fuels (coal, oil,
natural gas)

6. Describe energy
transformations:
 Candle-
flame Windmillburning=
mechanical
electromagnetic
to electrical
(light) to
thermal (heat)
6. Describe energy
transformations:

Motor = electrical to mechanical
6. Describe energy
transformations:
Toaster-
electrical
to
thermal
6. Describe energy
transformations:
Flashlight-
chemical
(battery) to
Electromagnetic
(light)
Describe energy
transformations:
 Car-
chemical
 (fuel) to
thermal
(heat) to
mechanical
Describe energy
transformations:
 Refrigerator-
electrical to
mechanical
(motor) to
thermal
Describe energy
transformations:

Fan- electrical
to mechanical
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Power plantchemical (burn fuel
– thermal energy to
boil water) to
mechanical (steam
turns the turbine) to
electrical p. 293
Study picture
Electric Power Plant
Burn a fuel
chemical
Boil water to
make steam
thermal
Mechanical
energy from
steam turns
turbine
Makes
electricity
7. Describe the steps of the
scientific method.
Give an example of each step.
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Problem- ask question
Hypothesis- if …then…
Experiment- step-by-step procedures
Variables- control (comparison)
constants (keep the same)
Organize data- table and graph
Conclusions- what did you learn
8. What is the difference between
the manipulated and responding
variable?
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Manipulated Variable- what you change
on purpose
Ex: number of coils
Responding variable- data, what you are
measuring
Ex: number of paperclips