MINERALS

For a mineral to be considered an ore, which requirement must it meet?

• It must be a common mineral
• Its production must not create pollution
• It must be naturally occurring
• Its production must generate a profit

The size of a minerals crystals is determined by what?

• magma composition
• rate of cooling
• cleavage vs. fracture
• lava composition

True or false; Sugar is not a mineral

• True that!
• False...umm no!

The ratio of the mass of a substance to the mass of an equal volume of water at 4 degrees C, is called what?

• specific gravity
• weight
• heftiness
• mass

What is the term for minerals containing silicon and oxygen?

• carbonates
• silicates
• sheet silicates
• nonsilicates

^{_{The following image shows what mineral property?}}

• Hardness
• Streak
• Cleavage
• None of the above

Which is one of the three most common elements in Earth's crust?

• Calcium
• Sodium
• Silicon
• Quartz

Use the Mohs Hardness Scale below. Which mineral can scratch fluorite, but is scratched by orthoclase feldspar?

• Calcite
• Talc
• Apatite
• Diamond

Refer to the Mohs Hardness Scale. A mineral with a hardness of 7 can scratch -

• orthoclase feldspar, but cannot scratch talc
• calcite, but cannot scratch apatite.
• topaz, but cannot scratch fluorite
• gypsum, but cannot scratch corundum

Which of the following best describes luster?

• The mass of an object
• The way light reflects off an object
• The texture of an object
• The density of an object