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Name: debi
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Date: 1993 - 1999


Question:
I need help on a student's question. We were discussing the states of matter and when we came to plasma I did not have a good answer for what plasma is other than it is found in the stars and does not occur on Earth. Can you give me more info on this subject?


Replies:
Plasmas are often called the fourth state of matter and can be found on earth in lightening and laboratories as well as theextreme upper atmosphere. Although like a gas, plasmas behave slightly differently because they are mixtures of positive ions and negative electrons; hence they respond to electrom agnetic fields.

John (e-mail hawley)



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