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? Carrying a stack of books Lifting a pile of logs Pushing down on a desk Swinging a baseball bat

Wordsplash Make a wordsplash on ENERGY

Energy is the ability to do _______ What is ENERGY? Energy is the ability to do _______ Work

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

FORMS OF ENERGY Both basic states of energy, Kinetic and potential, can exist in many forms!

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

Heat energy STORED within the _____. Ex: Volcanic eruptions, geysers GEOTHERMAL (HEAT) Earth Heat energy STORED within the _____. Ex: Volcanic eruptions, geysers

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

Energy STORED in the ________ (center) of an atom. Ex: nuclear bombs nucleus

MECHANICAL moving Energy with which ______ objects perform work. Ex: Wind, flowing water, using a hammer

SOUND A type of mechanical energy. It is the energy produced when objects ________. Ex: tuning fork, bell vibrate

A form of _______ energy that moves in a ______. Ex: lamp, stars LIGHT radiant A form of _______ energy that moves in a ______. Ex: lamp, stars wave

A form of energy produced by the ________ of ________ ELECTRICITY A form of energy produced by the ________ of ________ movement electrons

All forms of energy that come from the ______. SOLAR ENERGY All forms of energy that come from the ______. SUN

STORED MECHANICAL ENERGY: Stored energy due to a change in the shape of an object. Ex: _______________ A stretched rubber band

STORED MECHANICAL ENERGY:

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

Law of Conservation of ENERGY: (same for mass) Mass/ NRG ____________ Mass/ NRG ______________ Mass/ Energy can only __________ Can’t be made Can’t be destroyed Change form!!!

ENERGY TRANSFORMATIONS

Energy Transfer worksheet Read and answer the questions on the worksheet entitles energy transformations

UNUSABLE ENERGY: heat Very often during the energy transformation process, some ____ energy is produced due to friction. This is wasted energy and is lost to the environment.

An energy resource that is ________________________________. What is a NON-RENEWABLE RESOURCE? An energy resource that is ________________________________. Being used faster than Earth Produces it

Examples: __________________ 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

An energy resource that is _______________________________________. What is a RENEWABLE RESOURCE? An energy resource that is _______________________________________. Earth supplies faster than we use it “unlimited”

Examples: _______________________________ 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

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 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 gravitational height 2) An object that is lifted from its position on Earth has __________ potential Energy which depends on ______ and mass gravitational height

POTENTIAL ENERGY 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

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

Kinetic is energy of ___________ KINETIC ENERGY Kinetic is energy of ___________ Motion

2) Kinetic depends on the _____ and the _______ of an object. KINETIC ENERGY 2) Kinetic depends on the _____ and the _______ of an object. MASS SPEED

A Roller Coaster A roller coaster speeds along its track. It has kinetic energy because it is moving.

A Roller Coaster As it slows to a stop at the top of a hill, it has potential energy because of where 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 Please read the paragraph… Energy is constantly changing form…