Why do some onions spark when heated by microwave?

Subject: Why do some onions spark when heated by microwave?

Date: Sun Sep 3 20:43:20 2000
Posted by Ben Alkov
Grade level: nonaligned School: No school entered.
City: Raleigh State/Province: NC Country: USA
Area of science: Physics
ID: 968028200.Ph

Message:


Diced white onions will not only steam, spit, and occasionally explode, 
but frequently spark very brightly, even leaving small burn marks. I 
suspect there may be some trace of metallic elements or compounds in the 
onion's cells...

Re: Why do some onions spark when heated by microwave?

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