1. 1. Describe the energy transfersthat occur in a light bulb.2. Describe the energy transfers that occur when the body is powered by food.

2. Wt=50N 1. What is the KE at point A? Why? 2. What is the PE at point A? 3. What is the ME at point A? 4. What is the PE at point C? 5. What is the KE at point C? 3. Energy TypesCopy this chart in your notes with enough room to add details. Useyour book to fill in the information.Type Descriptions/Explanations ExamplesMechanicalThermal Chemical Electrical SoundLightNuclear 4. 1. Describe the energy transfers in a hairdryer. 2. What is the difference between renewable and nonrenewable energy resources? 5. Forms Explanation Example Total energy ofMechanical motion and position Total kinetic energyThermal of particlesEnergy stored inChemical rearranging atoms 6. Energy of movingElectrical electrons Energy of vibratingSound particles Vibrations of electricallyLightcharged particles Energy in the nucleus ofNuclear an atom 7. 1. Mechanical Energytotal energy of motion and positionME=KE + PE 8. An object on the top of a hill has high ____ energy and low ____ energy.As the object rolls down, what happens?Why does there seem to be less energy at the bottom of the hill than at the top? 9. 2. Electrical Energythe energy of moving electrons Like charges repel and+ +Opposite charges attract+ - 10. Two Types of ElectricityStatic ElectricityCurrent Electricity 11. The Power of Electricity Can be turned into other kinds of energy Can do work Hairdryer converts electric to thermal Alarm clock converts electric to sound andlight 12. 3. Nuclear Energythe energy of the nucleus of an atom Fission Fusion 13. Pros and Cons of Nuclear Energy Fission Fusion + make electrical+ fuel is plentiful energy + only small amounts + no carbon dioxide or of radioactive waste other gasesproducts - limited fuel supply- not currently - radioactive wastepractical products - large amount of - possible release ofenergy needed to radioactive material heat and contain thehydrogen plasma 14. The SunGiant nuclear fusionreactorUltimate source ofenergy for our planet 15. 4. Chemical Energy the energy of rearranging atoms Is photosynthesis endothermic or exothermic? Is respiration endothermic or exothermic? 16. 5. Sound Energythe energy of vibrating particles-caused byvibrations &carried througha substance. 17. Making Sound vs. Hearing SoundHave you heard this riddle? If a tree falls in the forest and no one is around tohear it, does the tree make a sound?0What do you think? 18. When a tree falls and hits the ground, the tree andthe ground vibrate. These vibrations aretransferred to the surrounding air.0 So there would be a sound!!! 19. Change Frequency = Change Pitch TRY IT! Vocal cords WATCH IT! Jars vs. Bottles 20. TRY IT! Hold the cut rubber band stretched tight. Have a partner pluck the rubber band with their finger. Notice the pitch. Shorten the length of rubber band by holding it in the middle. What was different?? 21. Echolocation 22. 6. Light Energythe vibrations of electrically charged particles Called PHOTONS 23. The EM Spectrum Visible light is one portion ofthe Electromagnetic Spectrum. All of these waves are energy-filled waves. Insects, like bees, see shorter wavelengths than humans. What type of EM waves do they see? WATCH IT! - prism 24. Possibilities of Light Light rays move away from their source in straight lines. When they hit something, they are eitherAbsorbed ReflectedRefracted(stopped)(bounced off)(bent)WATCH IT! - Mirror 25. TRY IT! Fill beaker half full of water. Put a pencil in the glass. Look at the pencil through the side of the glass. How does the pencil look different than it did before you put it in the water? This is an example of ______________. 26. TRY IT! Prop up the card with the arrow on it. Place a glass of water a little to one side of thecard and a few inches in front of it. Now stoop down until your eyes are level witharrow. Slide the glass between the card and youreyes. Try sliding it back and forth a few times. What happened? What causes this? 27. Light Source or Not?You can see a light source even in the darkbecause its light passes directly into youreyes. Most things around you are not lightsources. Why can you still see them? You can still see them because light from light sources reflects off the objects and then travels to your eyes. 28. The Speed of Light Watch this clip to learn more about the speed oflight. 29. Check your Light UnderstandingWhat is a photon?On the EM spectrum, what type of EM radiation has the highest energy radio waves, gamma rays, or x-rays?What are 3 possible things that can happen to light rays after they leave the source? 30. Sound & Light:Alike, but DifferentSound Light *vibration*does NOT*needs a mediumneed a medium *longitudinal*transverse 31. 7. Thermal Energythe total kinetic energy of the particles more thermal energy= faster movingparticles less thermal energy= slower movingparticles 32. Thermal Energy vs. Heat Heat is the transfer of energy between objects that are at different temperatures. 33. Three Kinds of Heat Conduction Convection Radiation(touch) (current)(rays)HotColdCommon 34. Check your Thermal Understanding Is thermal energy kinetic or potential? If you touch something in which the particles aremoving faster than the particles in your skin, howwould it feel? When objects have more thermal energy than theirsurroundings, what do you predict will happen interms of heat? 35. 1. What is heat?2. How does thermal energy play a role in the Law of Conservation of Energy? 36. Bill Nye; Heat BEFORE: List the forms of energy that you knowand understand DURING: Write notes about heat, conduction,convection, radiation AFTER: Write a paragraph that describes thermalenergy, heat, and the processes of conduction,convection, and radiation. 37. Roller Coaster Energy Problems HT=250 m WT=200NHT=20 mWT=200N M=20kg V=200m/s1. Find the PE at point A.2. Find the KE at point A.Answer the3. Find the ME at point A. problems on4. Find the KE at point B.the left on yoursheet under the5. What is the ME at point C?roller coaster6. Find the PE at point C.picture.7. Find the KE at point C.