This mineral is composed only of one element, carbon. it is listed as the hardest on mohs' scale of hardness. which mineral is this?

Diamond (I had the same question on USA test prep)

Explanation:

diamond A diamond is composed only of carbon. It is listed as the hardest on MOHs' Scale of Hardness. You often see jewelry made with this naturally occurring mineral.

odds are decent that your handwriting right now looks a little bit different than it did five years ago, and will look different again in five more. when i look back through my notebooks from middle school to now, i see a long, slow progression from meticulous and teeny letters to bigger, sloppier ones, plus a few side detours: sometime in high school, for example, i decided those loopy cursive lowercase f’s were just the coolest, adopting them as the lone rep for cursive in my otherwise all-print handwriting.

explanation: