Popcorn

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A slideshow where students learn about the three types of heat transfer with "Popcorn" as an example.

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Popcorn

  1. 1. POPCORN <ul><li>Cooking popcorn will help us learn about the three types of heat transfer </li></ul>
  2. 2. HOW does it POP? <ul><li>The corn is HEATED </li></ul><ul><li>The water inside the corn kernel is HEATED causing it to turn inside out (or POP!) </li></ul>
  3. 3. “Popped” Corn
  4. 4. <ul><li>We can TRANSFER heat to the Popping Corn in 3 Ways: </li></ul><ul><li>Stove top - CONDUCTION </li></ul><ul><li>Popcorn popper - CONVECTION </li></ul><ul><li>Microwave - RADIATION </li></ul>
  5. 5. On the Stove… <ul><li>(CONDUCTION) – which means there is DIRECT CONTACT </li></ul>
  6. 6. The stove heats the pan
  7. 7. The pan then heats the corn
  8. 9. With a Popcorn Popper <ul><li>CONVECTION – </li></ul><ul><li>Heat moves from a GAS or FLUID </li></ul><ul><li>Into FOOD! </li></ul>
  9. 11. <ul><li>The air (GAS) inside the popcorn maker is heated which heats the kernels </li></ul>
  10. 12. Radiation <ul><li>Is when heat is transferred through waves or rays – it DOES NOT require direct contact, e.g. Heat from the sun </li></ul>
  11. 13. <ul><li>The kernels are heated by radiation in the microwave. </li></ul>
  12. 15. <ul><li>HEAT turns the kernel inside out into the popcorn we enjoy..! </li></ul>
  13. 16. POPCORN!!!!
  14. 17. References <ul><li>http://www.trekearth.com/gallery/Middle_East/Turkey/photo554203.htm </li></ul><ul><li>http://www.cookware.org/tools_1.phphttp://www.foodwithlegs.com/?p=1389 </li></ul><ul><li>http://www.physics.arizona.edu/~thews/reu/Convection.bmp </li></ul><ul><li>http://adventuresinthekitchen.blogspot.com/2009/10/hot-air-popcorn-maker.html </li></ul><ul><li>http://www.wyckoffschools.org/eisenhower/teachers/chen/images/3-14.jpg </li></ul><ul><li>http://withonebreath.wordpress.com/2008/11/21/bpa-leaches-from-safe-products/ </li></ul><ul><li>http://kdbush.files.wordpress.com/2008/08/apg_micro_popcorn_070516_mn.jpg </li></ul><ul><li>http://farm3.static.flickr.com/2712/4236043866_132f608f30.jpg </li></ul><ul><li>http://indianapublicmedia.org/amomentofscience/files/2009/07/popcorn2.jpg </li></ul><ul><li>http://farm1.static.flickr.com/175/481755025_70d3af5dba.jpg?v=0 </li></ul>
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