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
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