Minerals and Rocks Review

Which mineral is hard enough to scratch calcite but not hard enough to scratch amphibole?

• Muscovite mica
• Flourite
• Olivine
• Graphite

A nonvesicular rock is made entirely of green 2-millimeter-diameter crystals that have a hardness of 6.5 and show fracture, but not cleavage. The rock is most likely

• Peridotite
• Dunite
• Scoria
• Granite

Which texture best describes an igneous rock that formed deep underground?

• Glassy 
• Vesicular
• Fine grained
• Coarse grained

Which mineral will scratch fluorite, galena, and pyroxene?

• Graphite
• Calcite
• Olivine
• Dolomite

What is the name of this rock?

• Granite
• Rhyolite
• Gabbro
• Basalt

Which mineral can be found in all samples of rhyolite and andesite?

• Pyroxene
• Quartz
• Biotite
• Potassium feldspar

The way a mineral reflects light is called

• Hardness
• Luster
• Streak
• Cleavage

What is the origin and rate of formation of this rock?

• Plutonic with slow cooling
• Plutonic with rapid cooling
• Volcanic with slow cooling
• Volcanic with rapid cooling

The graph shows the elements by mass in Earth's crust.  Which element is represented by the letter X?

• Silicon
• Lead
• Nitrogen
• Hydrogen

Biotite mica and muscovite mica have different chemical compositions. Compared to the magma from which biotite mica forms, the magma from which muscovite mica forms is usually

• More mafic and less dense
• More mafic and more dense
• More felsic and less dense
• More felsic and more dense