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Thursday: January 26,2017 1. 2. 3. 4. Please get Science Journals Review “Thermal Energy” Voc. “Thermal Energy” Notes Activity Thermal Energy Sort Exit Ticket Heat Transfer © Copyright 2015 – All rights reserved. www.cpalms.org Introduction – BBC Bitesize Check out the video “Conduction, Convection, and Radiation” from BBC Bitesize. © Copyright 2015 – All rights reserved. www.cpalms.org Heat Transfer There are three types of heat transfer: 1. Conduction 2. Convection 3. Radiation Can we have three methods of heat transfer at once? YES! © Copyright 2015 – All rights reserved. www.cpalms.org Conduction 1. Conduction – Transfer of heat through matter by the direct contact of particles. Imagine it is very cold outside and you walk to school. Happens most As soon as you come inside, frequently in solids, because I hand you a mug of hot in solids the particles are chocolate. What happens to packed closely your cold hands? together. © Copyright 2015 – All rights reserved. www.cpalms.org Conduction Can you think of some more examples of heat transfer through direct contact? © Copyright 2015 – All rights reserved. www.cpalms.org Convection You’re visiting your grandparents and find an old lava lamp. Groovy! You plug it in. After a few minutes, globs of a thick, colored liquid begin to rise from the base. When each glob gets to the top, it falls back down. • What do you think is happening? • Is this a method of heat transfer? © Copyright 2015 – All rights reserved. www.cpalms.org Convection One way that liquids and gases differ from solids is that they can flow. (What does flow mean?) This makes them fluids. Convection – heat transfer in a liquid or gas by flowing movement of heated particles © Copyright 2015 – All rights reserved. www.cpalms.org Convection In convection, the particles actually rotate and move from one place to another. Warm fluids rise while cooler ones sink. How is this different from conduction? © Copyright 2015 – All rights reserved. www.cpalms.org Radiation You go out to the pool for a nice morning swim. You jump in, and the water is freezing! Brr! You get in the pool again later that hot and sunny afternoon, and the water is several degrees warmer than it was before. • What happened? • Is this a form of heat transfer? © Copyright 2015 – All rights reserved. www.cpalms.org Radiation Where does all of earth’s heat energy come from? • Conduction and convection require matter (solid, liquid, or gas) to transfer heat. • However, there is very little matter between us and the sun. © Copyright 2015 – All rights reserved. www.cpalms.org Radiation Radiation is the transfer of energy by electromagnetic waves. © Copyright 2015 – All rights reserved. www.cpalms.org Left Side – Guided Practice Directions: Classify each example as conduction, convection, or radiation and write your answer in the chart. Conduction Convection Radiation © Copyright 2015 – All rights reserved. www.cpalms.org Left Side – Guided Practice Example 1: A pot sitting on a hot burner Example 2: Touching a metal spoon that is sitting in a pot of boiling water Example 3: A person placing their cold hands over a warm fire © Copyright 2015 – All rights reserved. www.cpalms.org Left Side – Guided Practice Example 4: Picking up a hot cup of coffee Example 5: Using an electric blanket to get warm Example 6: Putting your wet shoes on a floor vent to dry them faster. © Copyright 2015 – All rights reserved. www.cpalms.org Left Side – Guided Practice Example 7: Lying out in the sun to get a tan Example 8: Macaroni rising and falling in a pot of boiling water Example 9: Cold water sinking and warm water rising in the ocean © Copyright 2015 – All rights reserved. www.cpalms.org Left Side – Guided Practice Conduction Ex 1: A pot sitting on a hot burner Ex 2: Touching a metal spoon that is sitting in a pot of boiling water Ex 4: Picking up a hot cup of coffee Convection Ex 8: Macaroni rising and falling in a pot of boiling water Radiation Ex 3: A person placing their cold hands over a warm fire Ex 9: Cold water sinking Ex 5: Using an electric and warm water rising blanket to get warm in the ocean. Ex 7: Lying out in the sun to get a tan Ex 6: Putting your wet shoes on a floor vent to dry them faster © Copyright 2015 – All rights reserved. www.cpalms.org Independent Practice Gallery Walk On your own, complete the worksheet for the gallery walk. © Copyright 2015 – All rights reserved. www.cpalms.org Exit Slip © Copyright 2015 – All rights reserved. www.cpalms.org