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Unit 3 - Using Energy
Test Description: Common Assessment Unit 3 Review.
Instructions: Answer all questions to get your test result.
1) A pot holder is good for picking up hot pans because it's a good ___________.
A
conductor
B
modulator
C
insulator
D
refractor
2) Heat always ______________.
A
sinks
B
moves from slower molecules to faster molecules
C
rises
D
moves from faster molecules to slower molecules
3) Which of the materials below is the best condutor of heat?
A
air
B
wood
C
copper
D
plastic
4) When air is heated it rises. This is because:
A
denser cold air moves under warm air, pushing it up.
B
warm air has less mass than cold air.
C
Earth's gravity attracts warm air less than cold air.
D
when air is heated it turns into helium.
5) An electric burner on a stove is changing _____________.
A
electrical energy into heat energy
B
chemical energy into heat energy
C
light into electrical energy
D
heat into electricity
6) Flourescent lightbulbs are preferred over incandescent lightbulbs because they give off more light than __________.
A
magnetism
B
heat
C
sound
D
static electricity
7) In a simple electric motor, electricity passes through a coil of wire. The resulting electromagnetic field interacts with a _______________ to cause motion.
A
circuit
B
filament
C
compass
D
magnet
8) A lump of coal is an example of what kind of potential energy?
A
chemical
B
radiant
C
thermal
D
mechanical
9) A major problem with using electrical energy is that:
A
it is very difficult to creat.
B
it cannot be converted to other forms of energy
C
it cannot be used to do work
D
it is not easy to store.
10) When you recharge your cell phone you plug it into an electrical outlet for some time. The electrical energy is stored in the phone's battery as _____________ energy until you are ready to use the phone.
A
mechanical
B
chemical
C
radiant
D
nuclear
11) Modern humans obtain most of our energy for heat and machines from:
A
solar power
B
geothermal sources
C
fossil fuels
D
nuclear power
12) The law of ____________________ states that energy is not truly produced, but really only manipulated from one form to another.
A
manipulation of energy
B
energy transerence
C
energy production
D
conservation of energy
13) Radiant energy travels in the form of:
A
electromagnetic waves
B
chemical reactions
C
disturbances in solids, liquids, or gases
D
fast moving molecules
14) When you stand in front of a fire you feel warm. The heat that you feel is in the form of:
A
radio waves
B
ultraviolet radiation
C
infrared radiation
D
hot molecules
15) What kind of energy conversion takes place in the sidewalk on a hot sunny day?
A
radiant to thermal
B
thermal to radiant
C
radiant to chemical
D
chemical to thermal
*select an answer for all questions
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