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Heat Transfer

Heat Transfer. I can explain how heat is transferred through convection, conduction, and radiation. I can give examples of how convection, conduction, and radiation occur every day in the real world. 3 ways that heat can be transferred. The sun can heat things in 3 different ways.

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Heat Transfer

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  1. Heat Transfer • I can explain how heat is transferred through convection, conduction, and radiation. • I can give examples of how convection, conduction, and radiation occur every day in the real world.

  2. 3 ways that heat can be transferred • The sun can heat things in 3 different ways. • Reading: Class notes

  3. Heat Transfer Song

  4. Conduction • Heat is transferred through direct contact (touch). • Heat travels from the warmer object to the cooler object • Examples: touching a stove and being burned, ice cooling down in your hand

  5. Radiation • Heat is transferred through space in the form of waves. • Examples: Sun rays, a campfire, an open oven door, heat from a light bulb

  6. Convection • Heat transfer through liquids or gases as particle circulate (rise and fall). • Warmer areas of a liquid or gas rise (less dense) and then sink down when they get colder (more dense). • Creates a circle, because of density differences • Example: convection currents, water boiling in circles in a pot, greenhouse

  7. Check for Understanding: Question • In your notebooks answer the following question: • Where in this picture do you see radiation? • Where do you see convection? • Where do you see conduction?

  8. Check for Understanding: Answer

  9. Heat Transfer Practice • Directions: For each picture, show the correct sign when I count to 3. Do not put up sign before I count! • Convection: Hands in Shape of Circle (shape of convection movement) • Conduction: Hand to ear (directly touching ear) • Radiation: Hands in front (as if feeling heat from stove/campfire)

  10. Example #1 • How the inside of a greenhouse works.

  11. Example #2 A pan sitting on a hot burner.

  12. Example #3 • Touching a metal spoon that is sitting in a pot of hot soup

  13. Example #4 • A person placing their cold hands over a warm fire

  14. Example #5 • Using a heating blanket to get warm

  15. Example #6 • Macaroni rising and falling in a pot of boiling water

  16. Example #7 • A person placing their hand over a hot burner

  17. Example #8 • Putting your wet shoes on a floor vent to dry them faster

  18. Heat Transfer Tree Map

  19. Heat Transfer Lab Demonstration • Station 1: Beads • How to increase or decrease boiling. • Do not touch beaker! • Station 2: Ice • Hold ice for long enough to melt. • Station 3: Lamp • How to use a thermometer demonstration.

  20. Heat Transfer Lab • Work with ALL group members • Fill in your lab sheet during each station time. • Answer all lettered questions in the observation column • When finished, fill out heat transfer classification worksheet independently.

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