Elizabeth's Inquiry- Marshmallow

1.  Why do marshmallows expand in the microwave?

2.  http://www.newton.dep.anl.gov/askasci/chem03/chem03338.htm

http://scienceline.ucsb.edu/getkey.php?key=783

• I learned that marshmallows expands when they get hot.
• I learned that marshmallows have sugar foam in them.
• I learned that marshmallows are filled with air.
  
  

3.  My hypothesis:  A marshmallow expands when it is heated.

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5.  I see that it is flat. It is chewy.  It feels bumpy.

I notice that it is flat and almost stuck to the paper towel.

6.  I learned that marshmallows have foam sugar and that's why they expand.  I learned that as soon as the microwave is turned off, the foam collapses.  I learned that microwaves heat the water in the foam and the trapped air causes the marshmallow to swell up.  My hypothesis was right.