Below you will find the solution for: The number used to designate a pencil's hardness relates to the ratio of clay to this material a form of carbon Jeopardy .
Since you already solved the question The number used to designate a pencil's hardness relates to the ratio of clay to this material a form of carbon which had the answer GRAPHITE, you can simply go back at the main post to check the other answers. You can do so by clicking the link here Jeopardy April 27 2021
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