1C (G): Mohs Hardness Scale

Why is the Mohs Hardness Scale important?

• It determines a minerals resistance to being scratched.

• It measures temperature

• It calculates mineral weight

• It determines mineral color

Which mineral is rated as 5 on the Mohs scale?

• Apatite

• Fluorite

• Orthoclase

• Calcite

What is the hardness of orthoclase/Feldspar on the Mohs scale?

• 5

• 6

• 7

• 8

Which mineral cannot be scratched by orthoclase/feldspar?

• Fluorite

• Calcite

• Quartz

• Gypsum

What is the hardest mineral on the Mohs scale?

• Corundum

• Topaz

• Diamond

• Orthoclase

What is the hardness of quartz on the Mohs scale?

• 5

• 6

• 7

• 8

What is the hardness of gypsum on the Mohs scale?

• 1

• 2

• 3

• 4

Which mineral is the softest on the Mohs scale?

• Gypsum

• Talc

• Calcite

• Fluorite

What is the Mohs scale of hardness used to measure?

• Temperature

• How resistant a mineral is to being scratched

• Weight

• Color

Which mineral is ranked 5 on the Mohs scale?

• Apatite

• Orthoclase

• Quartz

• Topaz