EnergyEnergy

Unit 2Unit 2

SoundSound• Energy that can be Energy that can be

heard.heard.• Caused when Caused when

things vibratethings vibrate

PitchPitch• How high or how How high or how

low a sound islow a sound is

VolumeVolume• The loudness or The loudness or

softness of a softness of a soundsound

LightLight• A form of energy A form of energy

that lets you see that lets you see things-things-

• Example: colorExample: color

ReflectReflect• To bounce back, To bounce back,

like light from a like light from a mirrormirror

AbsorbAbsorb• To take something To take something

inin• Example: colors Example: colors

can be absorbed or can be absorbed or reflectedreflected

HeatHeat• A form of energy A form of energy

that makes things that makes things warmer.warmer.

• Most heat on Earth Most heat on Earth comes from the comes from the sun.sun.

ConductorConductor• An object that lets An object that lets

heat or electricity heat or electricity go through easily.go through easily.

InsulatorInsulator• An object that does An object that does

not let heat or not let heat or electricity go electricity go through easilythrough easily

ElectricityElectricity• A form of energy A form of energy

that can be used to that can be used to make heat and make heat and light, and to power light, and to power machinesmachines

CircuitCircuit• A path for an A path for an

electric currentelectric current• Often shown in a Often shown in a

diagram with a diagram with a battery, bulb, and battery, bulb, and wireswires

Open CircuitOpen Circuit• When the path of When the path of

electricity is electricity is broken and the broken and the light does not light does not come oncome on

Closed CircuitClosed Circuit• When the path of When the path of

electricity is electricity is complete and the complete and the light comes onlight comes on

SwitchSwitch• A device for A device for

turning on or off turning on or off electricity or an electricity or an electric currentelectric current