What is the definition of a ceramic?
A) An organic material that has been hardened by heating to a high temperature.
B) An inorganic material that has been hardened by heating to a high temperature.
C) An inorganic material that has been shaped or molded by heating to a high temperature.
D) An organic material that has been shaped or molded by heating to a high temperature.
E) A clay without hydrates within it.
Correct Answer:
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Q238: What makes emery different from corundum?
A) Impure
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A) One with
Q243: What is triboluminescence?
A) Another term for phosphorescence.
B)
Q244: What makes phosphors glow?
A) Electron impacts.
B) Plasma
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