Energy

Intro to . . .

Energy is the ability to cause change.

Terms to Know• potential energy• kinetic energy

• transformations• law of conservation of energy

• temperature• thermal energy

• heat• radiation

• conduction• convection

• chemical energy

Transformations

A change of energy from

one form to another.

For example . . .

Exploding fireworks are a

transformation of chemical energy into thermal and

light energy.

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.

LAW OF CONSERVATION OF ENERGY

Energy is neither created nor destroyed;

it only changes form

Thermal Energy

Total Kinetic Energy of the particles in a

material

TEMPERATURE HEATVS.

Transfer of

Thermalenergy

Measure of

Kineticenergy

How Thermal Energy Moves . . .

•Radiation•Conduction•Convection

Chemical Energy

Endothermic

Exothermic

Energy changing from one form to another is

called a

A: translocationB: transformationC: transportation

D: transfer

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.

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

Energy is used in homes to

A: cook vegetables in a microwaveB: light roomsC: play music from the

stereoD: all of the above

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

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.

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

The total kinetic energy of the particles in a material is called

A: thermal energyB: kinetic energyC: potential energyD: chemical energy

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

What is heat?

A: transfer of thermal energy

B: measure of temperatureC: measure of kinetic

energyD: transfer of potential

energy

Thermal energy flows from a system of high

temperature to a system of low temperature.

A: TrueB: False

Which of the following is NOT a way that energy

moves:

A: conductionB: convectionC: radiationD: mediation

Energy that is stored within bonds of

molecules is

A: kineticB: chemicalC: radiantD: light

Radiation involves the transfer of energy by

A: particle collisionsB: wavesC: airflowD: temperature change

The type of energy motion that may occur in

a vacuum (without matter present) is

A: radiationB: conductionC: convectionD: all of the above

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

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

What does a thermometer measure?

A: heatB: total energyC: average kinetic energyD: chemical energy

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

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