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added thermal insulator
An '''insulator''' is a substance that does not conduct [[electricity]] very well.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> Glass, porcelain, and plastics are examples of insulators.
An '''insulator''' is a substance that does not conduct [[electricity]] very well.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> Glass, porcelain, and plastics are examples of insulators.
an '''insulator''' also may refer to a material which does not conduct heat very well. This is a [[thermal]] insulator, such as hotpads for kitchen use, or home insulation to avoid heat loss during winter.
==References==
==References==