Review 2 Prueba de nivel 2

The Mohs Scale of Hardness was created by Friedrich ___ in 1812.

Which mineral is the hardest according to the Mohs Scale?

• Talc

• Gypsum

• Corundum

• Diamond

A mineral that can be scratched by a copper penny but not by a fingernail has a hardness between ___ and 3.5.

What is the hardness of a steel nail on the Mohs Scale?

• 2.5

• 3.5

• 5.5

• 7.5

According to the Mohs Scale, which mineral can scratch quartz?

• Apatite

• Topaz

• Gypsum

• Calcite

The difference in hardness between corundum and diamond is much ___ than between talc and gypsum.

Which of the following minerals is softer than calcite?

• Fluorite

• Gypsum

• Apatite

• Quartz