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What do you think?What do you think? A light bulb is turned on. It produces
light and warms up. Which statement is true? • A. All the electrical energy is transformed to
light energy and heat energy. • B. All the electrical energy is transformed to
light energy. • C. Some of the electrical energy is transformed
to light energy and some is destroyed. • D. All the electrical energy is transformed to
heat energy.
EnergyEnergy
Mrs. SmithMrs. Smith
Energy -
Has several forms (or types)
Exists in 2 States
Can be Convertedbut not destroyed
Can be Transformed or changed, but not created or
destroyed.
ChemicaChemicall ElectricalElectrical LightLight
NuclearNuclear HeatHeat
KineticKinetic
-- Energy - Energy of Motionof Motion
PotentiaPotentiall
- Stored - Stored EnergyEnergy
Law of Conservation Law of Conservation of Energyof Energy
The ability to do work or cause change.
SoundSound
Law of Conservation of energyLaw of Conservation of energy
What is the law of conservation of What is the law of conservation of energy? energy?
Energy can not be created or destroyed. It can only be transferred or transformed.
Energy TransformationsEnergy Transformations
What does it mean to “transform” What does it mean to “transform” something? something?
What type of energy is this?What type of energy is this?
Chemical (battery)Chemical (battery) Electrical (wire)Electrical (wire) Light (light bulb)Light (light bulb)
What is happening What is happening
to the energy?to the energy? Is it being created,Is it being created,
Destroyed or transformedDestroyed or transformed
As energy moves through a system it As energy moves through a system it can be can be transferredtransferred and/or and/or transformedtransformed..
Energy transformations involve the Energy transformations involve the energy changing into a energy changing into a new formnew form
Example: the chemical in the battery Example: the chemical in the battery is transformed into the electrical in is transformed into the electrical in the wire.the wire.
What happened to my energy?What happened to my energy?
Did my energy just disappear?Did my energy just disappear? Energy can be changed from one Energy can be changed from one
form to another. form to another. When energy changes form, the When energy changes form, the
same amount same amount of energy exists after of energy exists after the change as there was before the the change as there was before the changechange
For example, the chemical energy in For example, the chemical energy in a flashlight is transformed into a flashlight is transformed into electrical energy and then light electrical energy and then light energyenergy
StartingStarting energy is transformed to energy is transformed to finalfinal energy energy
Energy transformationsEnergy transformations
For example:For example:• When you ate breakfast this morning what When you ate breakfast this morning what
type of Energy were you consuming?type of Energy were you consuming?
• What type of Energy did you then use in What type of Energy did you then use in order to leave your house (or the order to leave your house (or the Cafeteria)?Cafeteria)?
• So, the So, the energy transformationenergy transformation was: was:•Chemical Chemical Kinetic Kinetic
Chemical
Kinetic
Starting Energy
Final Energy
One more example:One more example: This summer, my friends drove by several This summer, my friends drove by several
windmills on a trip out west (windmills on a trip out west (each windmill is about each windmill is about as tall as a 30 story buildingas tall as a 30 story building). They are used as an ). They are used as an alternative energy source.alternative energy source.
What type of Energy transformation is taking place?
Kinetic (Wind) Kinetic (Wind) Electrical Electrical
Stretching a slingshot and shooting a Stretching a slingshot and shooting a water balloonwater balloon
Potential Potential Kinetic Kinetic
A. 2 step energy transferA. 2 step energy transfer
______________ (of the wind) ______________ (of the wind) _______________ ( of the kite)_______________ ( of the kite)
Kinetic Energy
Kinetic Energy
B. 3 step energy transferB. 3 step energy transfer
__________ ( of the stove) __________ ( of the stove)
___________ (of the pot) ___________ (of the pot)
___________ ( of the water)___________ ( of the water)
Heat Energy
Heat Energy
Heat Energy
A. 2 step energy transformationA. 2 step energy transformation
______________ (of the lightning) ______________ (of the lightning) _____________ and ____________ (fire)_____________ and ____________ (fire)
Electrical Energy
Heat Energy Light Energy
B. 2 step energy transformationB. 2 step energy transformation
_____________ (of the skater) _____________ (of the skater) ______________ (of the skater)______________ (of the skater)
A
B
Kinetic Energy
Potential Energy
A. 2 step energy transformationA. 2 step energy transformation
____________ ( of the ball) ____________ ( of the ball)
___________( of the ball)___________( of the ball)
Potential Energy
Kinetic Energy
B. 3 step energy transformationB. 3 step energy transformation __________ ( of the ball) __________ ( of the ball)
___________ (of the ball) ___________ (of the ball)
__________ (of the ball)__________ (of the ball)
Kinetic Energy
Potential Energy
Kinetic Energy
Which baseball(s) have the most Which baseball(s) have the most potential energy/ kinetic energy? potential energy/ kinetic energy?
A
B
C
A. 2 step energy transformationA. 2 step energy transformation
_____________ (of gasoline) _____________ (of gasoline) ______________ (of motion of car)______________ (of motion of car)
Chemical Energy
Kinetic Energy
B. 2 step Energy transformationB. 2 step Energy transformation
____________ (of food) ____________ (of food)
_______________ (of running)_______________ (of running)
Chemical Energy
Kinetic Energy
A. 2 step energy transformationA. 2 step energy transformation
______________ (of sun) ______________ (of sun)
_____________ (of crops)_____________ (of crops)
Light Energy
Chemical Energy
B. 2 step Energy B. 2 step Energy TransformationTransformation
_____________ (movement of _____________ (movement of electrons) ____________ and electrons) ____________ and ___________ (of light bulb)___________ (of light bulb)
Electrons
Electrical Energy
Light Energy
Heat Energy
Give one Get oneGive one Get oneA. 4 step Energy TransformationA. 4 step Energy Transformation
___________ (of battery) ___________ (of battery) ___________ (of electrons) ___________ (of electrons) ______________ (of light bulb) ______________ (of light bulb) _____________ (of light bulb)_____________ (of light bulb)
Chemical Energy
Electrical Energy
Light Energy
Heat Energy
4 step energy transformation4 step energy transformation
_________ (of water) _________ (of water) __________ (of water) __________ (of water) _________ (of turbine) ________ (of _________ (of turbine) ________ (of generator)generator)
Potential Energy
Kinetic Energy
Kinetic Energy Electrical Energy
5 step Energy transformation: 5 step Energy transformation: Nuclear Power PlantNuclear Power Plant
_________ (of atoms) to _________ (of _________ (of atoms) to _________ (of water) to ________ (of steam) to water) to ________ (of steam) to ________ (of turbine) to _______ (of ________ (of turbine) to _______ (of generator)generator)
Nuclear Energy Heat Energy
Kinetic Energy
Kinetic Energy Electrical Energy
4 step energy transformation4 step energy transformation
Light Energy Chemical EnergyChemical Energy
Kinetic Energy