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