energy intro to... energy is the ability to cause change
TRANSCRIPT
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Energy
Intro to . . .
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Energy is the ability to cause change.
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Terms to Know• potential energy• kinetic energy
• transformations• law of conservation of energy
• temperature• thermal energy
• heat• radiation
• conduction• convection
• chemical energy
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Transformations
A change of energy from
one form to another.
For example . . .
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Exploding fireworks are a
transformation of chemical energy into thermal and
light energy.
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Kinetic Energy
Energy of movement
Depends on mass and
speed
Potential Energy
Energy of position
Depends on where it is in
relation to gravity,
magnetism, or some other
force
vs.
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LAW OF CONSERVATION OF ENERGY
Energy is neither created nor destroyed;
it only changes form
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Thermal Energy
Total Kinetic Energy of the particles in a
material
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TEMPERATURE HEATVS.
Transfer of
Thermalenergy
Measure of
Kineticenergy
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How Thermal Energy Moves . . .
•Radiation•Conduction•Convection
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Chemical Energy
Endothermic
Exothermic
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Energy changing from one form to another is
called a
A: translocationB: transformationC: transportation
D: transfer
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Energy is
A: only available when a force acts on an object.B: only found in moving objects.C: the ability of an object to stay at rest.D: the ability to cause change.
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Which of the following is an example of an
energy transformation?
A: light is reflected in a mirrorB: a rock sits on the groundC: electricity travels through a light bulb which lights the roomD: all of the above
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Energy is used in homes to
A: cook vegetables in a microwaveB: light roomsC: play music from the
stereoD: all of the above
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A wagon sitting still at the top of a hill has
A: neither potential or kinetic energy
B: only potential energyC: only kinetic energyD: both potential and kinetic energy
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The Law of Conservation of Energy states that
A: all vehicles must meet special standards to save gas.B: energy is neither created nor destroyed, it only changes form.C: ecosystems always lose energy as they develop.D: the food chain retains energy from one level to another.
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Which is true of kinetic energy?
A: it depends on mass and speed
B: it is energy of positionC: it depends on where an
object is in relation to an energy sourceD: exists in motionless objects
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The total kinetic energy of the particles in a material is called
A: thermal energyB: kinetic energyC: potential energyD: chemical energy
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Temperature is
A: the total amount of chemical energy of a substanceB: the measure of heatC: the measure of kinetic
energy in a substanceD: the measure of resistance to heat
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What is heat?
A: transfer of thermal energy
B: measure of temperatureC: measure of kinetic
energyD: transfer of potential
energy
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Thermal energy flows from a system of high
temperature to a system of low temperature.
A: TrueB: False
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Which of the following is NOT a way that energy
moves:
A: conductionB: convectionC: radiationD: mediation
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Energy that is stored within bonds of
molecules is
A: kineticB: chemicalC: radiantD: light
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Radiation involves the transfer of energy by
A: particle collisionsB: wavesC: airflowD: temperature change
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The type of energy motion that may occur in
a vacuum (without matter present) is
A: radiationB: conductionC: convectionD: all of the above
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The explosion of TNT involves breaking of chemical bonds that
release thermal energy. This type of chemical
reaction is called
A: an endothermic reactionB: an exothermic reactionC: an replacement reactionD: a synthesis reaction
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As a snowflake falls, it
A: loses kinetic energy and gains potential energyB: loses potential energy and gains kinetic energyC: gains potential and kinetic energyD: loses potential and kinetic energy
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What does a thermometer measure?
A: heatB: total energyC: average kinetic energyD: chemical energy
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Solar panels are used to heat the water of a
swimming pool. This represents a
transformation of
A: solar to kinetic energyB: thermal energy to electrical energyC: electrical energy to solar
energyD: solar energy to potential energy
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Energy conversions are never 100% efficient. Whenever energy is
transferred some becomes heat energy
that is no longer available to do work.
A: TrueB: False