the best person in the world. he's one in a million. he's polite, kind, thoughtful, and freaking hilarious. there is never going to be anyone like him. i love him more than any boy.
Slate is a rock, so you won't find it listed on the Mohs Scale, because that scale of hardness applies to minerals. I'll go out on a limb though, and suggest that slate is probably around 2 to 3 or so, but this will be variable, depending on the quality of the slate, and degree of weathering, etc. Slate is a rock, so you won't find it listed on the Mohs Scale, because that scale of hardness applies to minerals.
Hardness is a measure of how easily a material can be scratched or indented. Hard materials are often also very brittle - this means they have a low resistance to impact . Well known hard materials include diamond and hardened high carbon steels. Same units as for tensile strength. The methods used for testing hardness are the Brinell test which uses a hardened steel ball and produces a hardness number HB which can be used to compare the hardness of materials.