Graphite is one of many allotropes of carbon, typically found in igneous and metamorphic rocks, and forms as a result of contact or regional metamorphism. - Link
NPR's Skunk Bear posted a nice concise video on why we use graphite, what it is, and why it works. The weak Van der Waals forces between sheets of carbon allows the sheets to "slide" past one another and onto a piece of paper. Graphite is one of many allotropes of carbon, typically found in igneous and metamorphic rocks, and forms as a result of contact or regional metamorphism. - Link Wint-o-Green mint Life Savers seem to be the only flavor that exhibits triboluminescence; breaking or deformation of chemical bonds causes an ionization of air and a subsequent discharge of light. It can be hard to see when you're chewing them (using a mirror and sitting in the dark), but it also works if you hit them with a hammer. |
Who is Riss?
Alan Rissberger "No one warned me that life would involve science, except my science teacher. But, of course, he's going to say that. He's got a job to protect."
- Stephen Colbert, I Am America (And So Can You) Wish List
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