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15
×
Today, which renewable energy sources provide the U.S. with the most energy?
wind and hydroelectric
geothermal and solar
biomass and geothermal
solar and wind
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15
×
Based on information in the diagram, about how tall is the tree?
20 feet
80 feet
40 feet
10 feet
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15
×
What is the mass of this mineral?
5 g
20 g
10 g
15 g
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lifesaver
Give 10 points!
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×
shark
Other team loses 10 points!
Okay!
×
fairy
Take points!
5
10
15
20
25
×
thief
Give points!
5
10
15
20
25
15
×
What uses the most energy in U.S. homes each year?
refrigerators
heating and air conditioning
lighting
computers
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15
×
Which of these correctly shows what happens when two magnets are placed side by side?
B
A
C
D
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15
×
True or False: Energy cannot be created or destroyed.
False
True
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15
×
Students place a pencil in a glass of water as shown. The pencil in the water looks broken because -
water can dissolve in pencils
water is colder than air
light is absorbed when it hits the glass
light bends when it enters the water
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trap
No points!
Oops!
×
fairy
Take points!
5
10
15
20
25
×
fairy
Take points!
5
10
15
20
25
×
thief
Give points!
5
10
15
20
25
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thief
Give points!
5
10
15
20
25
×
seesaw
Swap points!
Okay!
×
fairy
Take points!
5
10
15
20
25
×
baam
Lose 25 points!
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15
×
An electric motor is designed to turn electrical energy into -
mechanical energy
solar energy
potential energy
static electricity
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15
×
Which of these can be observed in this picture?
The moon is circular.
The moon spins around on its axis.
The moon has little air.
The moon is solid rock.
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15
×
When a coin is dropped, it falls to the ground. As the coin falls, it loses potential energy and gains what kind of energy?
Kinetic
Chemical
Solar
Electrical
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15
×
A shiny aluminum screen can be placed on the windshield of a parked car. This screen helps to keep the car cool because it -
reflects the sunlight
conducts electricity
causes evaporation
absorbs heat
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15
×
Which of these best shows kinetic energy?
A
B
C
D
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15
×
Light rays that bounce back are -
radiant
refracted
radar
reflected
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×
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