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5
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How do solar thermal power plants generate electricity?
heliostats direct light energy to turn water into steam
heliostats direct thermal energy to turn water into steam
PV cells absorb thermal energy and convert it to electrical
PV cells absorb light energy and convert it to electrical
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thief
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rocket
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fairy
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thief
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Why do incandescent (old fashion) light bulbs require more energy than LED (modern) light bulbs?
more energy is converted to thermal instead of radiant
they are larger than LED
more energy is converted to radiant instead of thermal
they use a 3-prong plug
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What kind of resources are coal, water, and wood?
natural resources
renewable resources
non-renewable resources
man-made resources
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True or False: Fossil fuels are made from the fossils of dinosaurs and prehistoric plants.
False
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When does Newton's cradle have the most potential energy?
at rest
when it is initially pulled back
halfway in its upward swing
halfway in its downward swing
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According to the law of conservation of energy, what is the 1st energy conversion that takes place when fossil fuels are used to generate electricity?
stored chemical energy transforms into thermal energy
mechanical energy transforms into electrical energy
look directly into the sun
thermal energy transforms into mechanical energy
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According to the law of conservation of energy, what is the 3rd energy conversion that takes place when fossil fuels are used to generate electricity?
stored chemical energy transforms into thermal energy
mechanical energy transforms into electrical energy
thermal energy transforms into mechanical energy
getting struck by lightning
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True or False: A downfall to nonrenewable resources is that they can take as long as 10 years to replenish.
False
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Why don't bouncy balls return to their starting height when dropped without an applied force?
friction converts kinetic energy into thermal energy
gravity becomes stronger near the ground
it should, but doesn't because gravity is acting on the ball
the inertia is greater than the starting potential energy
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Which of the following are needed to create fossil fuels?
cold, pressure, thousands of years
heat, pressure, hundreds of years
heat, pressure, millions of years
heat, volume, millions of years
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heart
Other team wins 20 points!
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gift
Win 20 points!
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gift
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baam
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banana
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magnet
Take 15 points!
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rocket
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thief
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5
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How could electromagnetic induction be produced? (2 options)
with electricity being applied to a magnet
with a changing magnetic field surrounded by plastic wires
by rotating either the metal wire or magnetic field together
none of the above
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According to the law of conservation of energy, what is the 2nd energy conversion that takes place when fossil fuels are used to generate electricity?
thermal energy transforms into mechanical energy
touching fire with your bare hands
stored chemical energy transforms into thermal energy
mechanical energy transforms into electrical energy
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What is the difference in electricity generation between solar panels and power plants like wind, coal, and nuclear?
Coal, wind, and nuclear are cleaner than solar.
Solar is non-renewable, while coal, wind, and nuclear are.
Solar panels don't use electromagnetic induction.
Solar panels produce more harmful radiation than the others.
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