Transcript ENERGY
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. 2. 3. 4. 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 What is ENERGY? Energy is the ability to do _______ Work Work occurs when a _____ force causes move an object to _____ in the same direction as the force. FORMS OF ENERGY Both basic states of energy, Kinetic and potential, can exist in many forms! THERMAL (HEAT) Kinetic energy of the particles in The total ________ matter. (molecular motion) GEOTHERMAL (HEAT) Heat energy STORED within theEarth _____. Ex: Volcanic eruptions, geysers CHEMICAL Energy STORED in chemicalbonds ____ that can be released. Ex: food, fossil fuels, battery acid NUCLEAR Energy STORED in the ________ nucleu (center) of an atom. s Ex: nuclear bombs MECHANICAL Energy with whichmoving ______ 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 LIGHT A form of _______ radiant energy that moves in awave ______. Ex: lamp, stars ELECTRICITY A form of energy produced by the ________ movemenof electron t ________ s SOLAR ENERGY All forms of energy that come from theSUN ______. STORED MECHANICAL ENERGY: Stored energy due to a change in the shape of an object. Ex: A stretched rubber _______________ band STORED MECHANICAL ENERGY: ENERGY TRANSFORMATIONS Do you remember the LAW OF CONSERVATION OF MASS AND ENERGY? Law of Conservation of ENERGY: (same for mass) Can’t be made Mass/ NRG ____________ Mass/ NRG ______________ Can’t be destroyed Mass/ Energy can only __________ Change form!!! ENERGY TRANSFORMATIONS Energy Transfer worksheet • Read and answer the questions on the worksheet entitles energy transformations UNUSABLE ENERGY: Very often during the energy transformation process, some heat ____ energy is produced due to friction. This is wasted energy and is lost to the environment. What is a NON-RENEWABLE RESOURCE? 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 RENEWABLE RESOURCE? An energy resource Earth supplies faster than we use it . that is _______________________________________ “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 Example: Videos • Solar energy • http://science360.gov/obj/video/cb617b374eb5-4518-b44a-da0b7d0190e0 • Wind Energy • http://science360.gov/obj/video/de111fd35fb6-49ae-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? POTENTIAL ENERGY 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 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 KINETIC 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 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/c5be54562e39-49a7-8118-218868df89eb Potential and Kinetic energy handouts ENERGY TRANSFORMATIONS Please read the paragraph… Energy is constantly changing form…