ENERGY

Starter

• Directions: Classify the following measurements as Force, momentum, Velocity, acceleration.

• 1. m/s squared

• 2. Newton

• 3. kg·m/s squared

• 4. m/s

• 5. kg·m/s

Review

1. What are the 3 scenarios possible where no work is done?

2. Which of the following are examples of work?

1. Carrying a stack of books

2. Lifting a pile of logs

3. Pushing down on a desk

4. Swinging a baseball bat

Wordsplash

• Make a wordsplash on

ENERGY

What is ENERGY?Energy is the ability to do

_______Work

Work occurs when a _____ causes an object to _____ in the same direction as the

force.

moveforce

FORMS OF ENERGYBoth basic states of energy, Kinetic and

potential, can exist in many forms!

The total ________ energy of the particles in matter. (molecular motion)

Kinetic

THERMAL (HEAT)

Heat energy STORED within the _____. Ex:

Volcanic eruptions, geysers

EarthGEOTHERMAL (HEAT)

Energy STORED in chemical ____ that can be released. Ex: food, fossil fuels, battery acid

bonds

CHEMICAL

Energy STORED in the ________ (center) of an atom.

Ex: nuclear bombs

nucleus

NUCLEAR

Energy with which ______ objects perform work.

Ex: Wind, flowing water, using a hammer

MECHANICALmoving

A type of mechanical energy. It is the energy produced when objects ________. Ex:

tuning fork, bellvibrate

SOUND

A form of _______ energy that moves in a ______.

Ex: lamp, stars

radiant

LIGHT

wave

A form of energy produced by the

________ of ________

movement

ELECTRICITY

electrons

All forms of energy that come from the ______.SUN

SOLAR ENERGY

Stored energy due to a change in the shape

of an object. Ex: _______________

A stretched rubber band

STORED MECHANICAL ENERGY:

STORED MECHANICAL ENERGY:

Do you remember the LAW OF CONSERVATION OF MASS AND ENERGY?

ENERGY TRANSFORMATIONS

Law of Conservation of ENERGY: (same for mass)

Mass/ NRG ____________Mass/ NRG ______________

Mass/ Energy can only __________

Can’t be madeCan’t be destroyed

Change form!!!

ENERGY TRANSFORMATIONS

Energy Transfer worksheet

• Read and answer the questions on the worksheet entitles energy transformations

Very often during the energy transformation process, some ____ energy is produced due to friction.

This is wasted energy and is lost to the environment.

heat

UNUSABLE ENERGY:

An energy resource that is ________________________________.Being used faster than Earth

Produces it

What is a NON-RENEWABLE RESOURCE?

Examples:__________________Fossil Fuels,

minerals

What is a NON-RENEWABLE RESOURCE?

To make our non-renewable resources last longer we can _____________________________________________.Reduce, Reuse, & Recycle

What is a NON-RENEWABLE RESOURCE?

An energy resource that is _______________________________________.Earth supplies faster than we use it

“unlimited”

What is a RENEWABLE RESOURCE?

Examples: _______________________________

Solar, wind, biomass (trees

etc..)

What is a RENEWABLE RESOURCE?

A renewable resource produces less _________ (substance that can harm living things and/or

the environment

pollution

What is a RENEWABLE RESOURCE?

Example:

Videos

• Solar energy

• http://science360.gov/obj/video/cb617b37-4eb5-4518-b44a-da0b7d0190e0

• Wind Energy

• http://science360.gov/obj/video/de111fd3-5fb6-49ae-a02f-11558b417011

Energy forms and Sources

• Complete the energy forms and sources handout

All forms of energy can be classified as Kinetic or potential.

The two basic states of energy. So, what’s the difference?

1) Potential energy is stored energy due to and object’s

_____________

Position

POTENTIAL ENERGY

2) An object that is lifted from its position on Earth has __________ potential Energy which depends on

______ and mass

gravitational

POTENTIAL ENERGY

height

3) Massive objects have _____ potential energy than less massive objects

more

POTENTIAL ENERGY

4) An object at a higher elevation will have _____ potential energy than an object at a lower

elevation

more

POTENTIAL ENERGY

3) Faster objects have ____ kinetic energy than slower objects.

More

KINETIC ENERGY

1) Kinetic is energy of ___________

Motion

KINETIC ENERGY

2) Kinetic depends on the _____ and the _______ of an object.

MASS

KINETIC ENERGY

SPEED

A Roller Coaster

A roller coaster speeds along its track. It has kinetic energykinetic energy because it is movingmoving.

A Roller Coaster

As it slows to a stop at the top of a hill, it has potential energypotential energy because of wherewhere it is. It has the potential to move because it is above the ground and has somewhere to go.

Formulas

KE = 1/2 m v2

PE = mgh = Fwh

Videos

• Energy and Power

• http://science360.gov/obj/video/c5be5456-2e39-49a7-8118-218868df89eb

Potential and Kinetic energy handouts

Please read the paragraph… Energy is constantly

changing form…

ENERGY TRANSFORMATIONS