2. Science Biology Study of living things. Chemistry Study of chemical reactions. Physics How things work Earth science Study of the earth.

3. Energy

4. Energy comes in many forms: 1. Thermal Ex.___________________________ 2. Chemical Ex.___________________________ 3. Electrical Ex.___________________________ Steam, Sun, Geothermal Gas, Food, Batteries Lights, Stoves, Stereo, Television

5. Energy comes in many forms: 4. Sound Ex.___________________________ 5. Light Ex.___________________________ 6. N uclear Ex.___________________________ Speakers, Animals (Bats, Whales, Our Voices) Light bulb, Sun, Fire Power Plant, Sun is a nuclear furnace!

6. Energy in Motion Kinetic energy (KE) is… Energy that appears in motion. Examples of Kinetic Energy (KE): Anything that moves!!

7. Energy in Motion (not in notes, but very important!!) Every object has some kinetic energy!! Except at ______ ______ (-273) Even objects that are not moving. WHY??? All substances have moving or vibrating atoms and molecules!! The Temperature of an object is that objects Average Kinetic Energy.

9. Energy in Motion Kinetic energy (KE) depends on a moving objects _____ and ______. massvelocity Which has more K.E., a train moving at 60mph or a car moving 60mph?HINT? Which has more K.E., a car traveling at 30mph or the same car moving at 60mph? The unit of energy is called the _____ (J), is its symbol, and it’s named after __________________ an English Scientist. Joule James Prescott Joule The Train The car moving 60mph

10. James Prescott Joule British physicist James Joule is best known for his work in electricity and thermodynamics (the study of heat). Joule discovered the relationship between electrical current, electrical resistance

11. Potential Energy (PE) Potential energy is… Energy that is stored in an object. Based upon position. Examples of Potential Energy: 1. Bow and arrow 2. Rock at the top of a hill 3. Sledding or skiing at the top of the hill 4. A car full of gas.

12. Potential Energy (PE) Who has the most potential energy, Mr. Joule 1 or Mr. Joule 2?

13. Potential Energy (PE) Who has the most potential energy, Mr. Joule 1 or Mr. Joule 2?

14. Potential Energy (PE) Potential energy is…Energy that is stored in an object. Based upon position. PE= mass x height

15. Cantaloupe 20ft. Above the street 2 pounds Watermelon 10ft. Above the street 4 pounds Cantaloupe 20ft. X 2 pounds= 4 0PE Watermelon 10ft. X 4 pounds= 4 0PE The potential energy is the same!!

16. Potential Energy (PE) B.Billy Bob decided to break the rules and “fling” a rubber band across the room at his sweetheart Sally Sue. When he did this ________ energy was transferred to _______ energy. potential kinetic C.Mechanical energy is… Potential and Kinetic energy together D.Give 3 examples of chemical potential energy. 1)Food 2)Fuel 3)Batteries

17. Mechanical Energy = Potential + Kinetic Efficiency- Is the difference between total potential energy and total kinetic energy of the system. The energy difference is lost as heat. All three dishwashers accomplish the same task equally, they clean a load of dishes. Which one is more efficient? Dishwasher 1 Dishwasher 2 Dishwasher 3 120 Units of electricity 160 Units of electricity 100 Units of electricity

18. Law of Conservation of Energy The total amount of energy remains constant. Energy can not be destroyed nor created. Energy can be converted into different forms.

19. Where is my kinetic and potential energy? KE PE KE PE KE PE KE PE low high Increasing Decreasing high low Decreasing Increasing What 2 forces cause Mr. Joule to come to a stop at the top of the hill? Friction & Air resistance

20. . What is happening to the kinetic and potential energy? KE PE KE PE KE PE KE PE KE PE

21. Energy Lab Present 1 system with at least 6 forms of energy conversions. Slide #1: Present a diagram on a power point with 6 forms of energy labelled. Site where you found this diagram on the bottom of the slide. Slide #2: Write a paragraph for each system explaining how energy is converted from one form to another. Complete the 25 multiple choice lab questions

22. Energy Project Rubric 25pts. Clear, colorful, and labeled diagram on power point slide 25pts. Written paragraph explaining your system. 25pts Multiple choice Lab Questions 25 pts. Presentation with eye contact

23. Energy Project Diagram Example: Light energy from screen. Chemical energy from battery. Heat energy given off from fan Electrical energy to charge battery from cord. Sound energy from speakers

24. Electromagnetic Spectrum Wavelength in meters (m) Frequency in Hertz (Hz) Only a small part can be seen by our eyes!

25. If you have electromagnetic radiation with a wave length of 1 meter, what is its frequency? I have an electromagnetic wave with a frequency of 10 19 hertz, what type of electromagnetic radiation is this? At what frequency does the radiation that causes skin cancer fall at? If you have electromagnetic radiation with frequency of 10 22 hertz, what is the wavelength? What type of radiation has a wavelength of 10 2 meters?

26. End of Kinetic and Potential Energy! Heat Transfer Next!