The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science.
Enjoy Teaching Rocks Freebie - Pump up your geology unit! Grab this set of rock identification tools with properties, the MOHs scale, and a handy table. Stop by Enjoy-Teaching.com every week for new ideas, links, and freebies for third grade, fourth grade, and fifth grade.
Petrified Forest National Park in Arizona is definitely a drive-through park. All those million years ago this area was an upright tropical forest. Fallen trees accumulated in river beds and were buried by volcanic ash. Wondering what else there is to do in the area around The Petrified Forest? Geology Wonders