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Popcorn

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

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

Published in: Education

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Transcript

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