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Solar Oven Ideas Slide 2 Why Solar Ovens Go Green http://www.youtube.com/watch?v=KIap7v3NHZ4 Nature Conservancy: Haiti http://www.youtube.com/watch?v=s hqgNSC1O3M http://www.youtube.com/watch?v=s hqgNSC1O3M Pizza Box http://www.youtube.com/watch?v=x bwliZJiHe8 http://www.youtube.com/watch?v=x bwliZJiHe8 Slide 3 Your Mission To design a solar oven that will create the most thermal energy in 45 minutes using common supplies (cardboard boxes (shoe box, pizza box, larger box, etc.) tin foil, plastic wrap, newspaper, etc.) You must work in groups of 3 or 2 (need team name) You will calculate volume of oven (minimum of 1,000cm 3, joules of energy converted, and power of oven You can choose to bring ingredients from the provided recipes (only) to make something for your group/self Slide 4 Slide 5 Slide 6 Provided Items Tin foil (about 4 sheets (8.5x11)) Plastic wrap (about 4 sheets of 8.5x11) 2 sheets black paper (which I would like back at the end) Glue, staples, tape (not very strong) Slide 7 Items Your Team Must Provide The container (be creative!) Extra tin foil (if needed) Extra plastic wrap (if needed) Insulation (if needed) Substitutes for any of the above materials (for example: if you want plexi-glass or something more heavy duty then plastic wrap) Any pre-cooked food items (basically we are only melting or re-heating foods for safety reasons, must come packaged) Slide 8 WARNINGS: Please use caution when cutting cardboard, especially with sharp scissors or exacto knives Please only bring food that is pre-cooked and packaged DO NOT LOOK DIRECTLY AT THE SUN! Slide 9 Calendar of Events 4/2/13 Tuesday: Create Teams, Team Name, Brainstorm Ideas, preliminary list of materials 4/8/13 Monday: GUARDIAN SIGNATURE is REQUIRED. In class time to research design and materials wanted 4/9/13 Tuesday: Final proposal of design, materials, and recipe (if cooking food) 4/16/13 Tuesday: ALL MATERIALS DUE (in class time to assemble solar oven) 4/17/13 Wednesday: COMPLETED SOLAR OVEN DUE HEAT IS ON CHALLENGE DAY: TBD because of weather (hopefully 4/17/13 Wednesday) Slide 10 Rough Draft Proposal Team Name: Team Members: Possible Materials, quanities and Rational/Explanation FOR ALL MATERIALS DESIRED: Design Sketch and LABELED! MaterialQuantityRational (why this material?) Slide 11 Grading Requirements For Each Group Materials Proposal/Solar oven trial 1 (requirements coming) 20pts. Solar Oven, materials must be approved before hand (rough draft proposal) 20pts. (temperature must be raised to at least 100 degrees F ) Calculations and final conclusion questions 10pts. Slide 12 Final Proposal Team Name: Team Members: Hypothesis: estimated final temperature _______ Possible Materials, quanities and Rational/Explanation FOR ALL MATERIALS DESIRED: Design Sketch and LABELED! MaterialQuantityPurpose / or why this material Slide 13 Warm-up 4/8/13 Teach the Teacher: Would you rather be caught picking your nose or picking a wedgie? Review: For every action there is an _______ and equal reaction. Slide 14 Warm-up 4/11/13 Teach the Teacher: What is the best thing to do on a snow day? Review: What kind of energy does the sun produce (fission or fussion?) Slide 15 Warm up 4/12/13 Teach the Teacher: What is the best kind of cookie? Review: What is the units for energy? Slide 16 Warm-up 4/16/13 Teach the Teacher: What was your favorite movie when you were kid? Review: What is the definition of temperature? Slide 17 Warm-up 4/15/13 Teach the Teacher: What is the best place to take little kids in Rapid? Review: What is newtons first law? Slide 18 Warm-up 4/18/13 Teach The Teacher: What is the most annoying animal? Review: What is the gravity #? Slide 19 Warm-up 4/19/13 Teach the Teacher: How do you like your eggs cooked (scrambled, sunnyside, etc)? Review: What is specific heat? Slide 20 Warm-up 4/25/13 Teach The Teacher: What is the worst house chore? What is the best? Review: What exactly does temperature measure? Slide 21 Warm-up 4/26/13 Teach the Teacher: What is the song of choice today? Review: What type of energy depends on your position(height)? Slide 22 Dice It Different Types of Shoes Slide 23 Dice It Names of People in TV shows Slide 24 Dice It! Types of Chemical Energy Slide 25 Dice it! Examples of KE Slide 26 Dice It! Where do we get electrical energy from? Slide 27 Dice It! Examples of nuclear energy Slide 28 Dice it! Examples of things that need electricity Slide 29 Dice It Examples of things that have potential energy Slide 30 What did they learn they can and cant do? Rules? IDs? Security guards? How to be successful? How to deal with drama? How to pass classes? Clubs to join? Activities to go see? Whats the best lunch? How to make new friends? Students can be as creative/funny as they want and still be appropriate. Slide 31 Warm-up 4/30/13 Teach the Teacher: What kind of tattoo should I get? Review: What is thermal energy? Slide 32 Solar Oven Trial 1 1.What were some (at least 2) environmental factors that affected the heat in your oven? Brainstorm ideas to counteract these environmental factors next time. 2.What design modifications would you make to improve your ovens maximum temperature? Slide 33 Warm-up 5/1/13 Teach the Teacher: Any May Day stories? Review: What happens to particles in conduction? (mosh pit) Slide 34 Warm-up 5/2/13 Teach the Teacher: What is the best kind of doughnut? Review: What is convection? Slide 35 Warm-up 5/3/13 Teach the Teacher: Would you rather always have sticky fingers or always have bad breath Review: What is the difference between conduction and convection (mosh pit vs. lava lamp)? Slide 36 Warm-up 5/6/13 Teach the Teacher: Who is the best super villain? Review: What is it called when Thermal Energy moves from a warm to cold substance? Slide 37 Warm-up 5/7/13 Teach the Teacher: What has been the best assignment of your freshman year? Review: What is the kinetic and potential energy of particles in an object. Slide 38 Solar Oven Trial 1 1.What were some (at least 2) environmental factors that affected the heat in your oven? Brainstorm ideas to counteract these environmental factors next time. 2.What design modifications would you make to improve your ovens maximum temperature? Slide 39 Warm-up 5/8/13 Teach the Teacher: Would you rather have a long summer break, or have a winter and summer break? Review: Mechanical energy is what two things added together? Slide 40 Warm-up 5/9/13 Teach the Teacher: Do you like to eat fish? Review: Temperature actually measures this Slide 41 Section 3 notes USING HEAT: Slide 42 Heating Systems Heating systems vary depending on climate Before only stoves/fires used to heat: but is a slow process Slide 43 Forced Air Systems Furnace warms air, then spreads air using ducts and vents Cool air is returned to be heated again Most common in US Slide 44 Radiator Systems Closed metal container with hot water or steam Through conduction, thermal energy passed to the surrounding air Slide 45 Electric Heating Systems Electric coils in floors heat surrounding air by conduction, then convection currents heats the rest of the room Slide 46 Solar Heating Buildings use the suns radiation in 2 ways Passive: materials easily absorb radiation and heat naturally Active solar: solar cells Slide 47 Passive Solar Heating Need lots of south facing windows Slide 48 Active Solar Heating Uses solar collectors, photovoltaic (PV) cells, or solar panels to create electricity or warm water to radiate heat Slide 49 Thermodynamics The study of how thermal energy, heat, and work are related Heat and work increase TE Heat can only move from warm to cold, unless work is done (think about rubbing your hands together) Slide 50 Converting Heat to Work Heat engine: converts thermal energy to mechanical energy ME=____+_____ Internal Combustion Engines: fuel is burned inside cylinders and turn heat to work http://www.youtube.com/watch?v=w- j8QvsiAdU http://www.youtube.com/watch?v=w- j8QvsiAdU Converts only 25% of heat to mechanical energy- 75% of heat is lost (thats why coolant is needed!) Slide 51 Heat Movers Heat movers move TE from one location to another at a different temp Slide 52 Heat Mover: Refrigerators Does work so that heat can move from inside refrigerators to outside Needs coolant: evaporates at a low temperature Liquid coolant->gas (cool)->pumped to coils in fridge and TE goes from warm to cold->warm gas compressed doing work-> becomes warmer then outside air and heat flows to outside air, process starts all over again. Slide 53 Air Conditioners and Heat Pumps Air conditioners: Work like refrigerators, just does the opposite Heat pump: can cool and warm air Slide 54 Human Coolant As sweat evaporates absorbs TE, taking heat away from your body Slide 55 Match it Words! 1)Temperature 2)Insulator 3)Conductor 4)Convection Currents 5)Conduction 6)Radiation 7)Heat 8)Specific Heat 9)Combustion 10)Thermal Energy 11)Kinetic Energy Slide 56 Word Bank Slide 57 Flash Card On the Front: T emperature On the back: Measure of KE of atoms in an object Slide 58 Flash Card On the front: Thermal energy On the back: The total of PE + KE of atoms in an object Slide 59 Flash Card On the front: Heat On the back: Thermal energy that flows from high temp. to low temp. Slide 60 Flash Card On the front: Specific heat On the back: Amount of heat that is needed to ^ the temp of 1kg of something 1*C Slide 61 Flash Card On the Front: Conduction On the back: Transfer of thermal energy by collisions of particles Slide 62 Flash Card On the Front: Convection ON the back: The movement and transfer of TE of warm and cold fluids Slide 63 Flash Card: On the front Radiation On the Back: Is the transfer of energy by electromagnetic waves Slide 64 Word Bank Heat engine Radiation Combustion Insulators Specific Heat Conductor Kinetic Energy Vacuum