💪🏿 Extension Quizizz: U7 Minerals and Igneous Rocks

The basaltic rock that forms volcanic mountains where mantle plumes reach Earth’s surface is usually composed of 

• fine-grained, dark-colored felsic minerals
• coarse-grained, light-colored felsic minerals
• fine-grained, dark-colored mafic minerals
• coarse-grained, light-colored mafic minerals

Which mineral is mined for its iron content?

• hematite

• galena

• fluorite

• talc

The data table gives characteristics of the gemstone peridot.

Peridot is a form of the mineral

• pyrite
• olivine
• pyroxene
• garnet

Describe the texture and color of basalt that is produced produced by the Yellowstone Hot Spot.

• Texture—glassy
  Color—darker
• Texture—coarse
  Color—lighter
• Texture—fine
  Color—lighter
• Texture—non-vesicular
  Color—darker

Identify two minerals found in an igneous rock that is produced from the explosive rhyolite magma.

• quartz and olivine
• biotite and pyroxene
• potassium feldspar and quartz
• potassium feldspar and olivine

Identify the environment of formation of this igneous rock based on the size of its intergrown crystals.

• volcanic
• extrusive
• in a lava flow
• intrusive

Based on the minerals present, identify the relative color and density of this igneous rock compared to mafic igneous rocks with the same crystal size.

• Color—darker
  Density—higher
• Color—darker
  Density—lower
• Color—lighter
  Density—higher
• Color—lighter
  Density—lower

Rock B has a glassy, vesicular texture and is composed mainly of potassium feldspar and quartz. State the name of rock B.

• obsidian
• pumice
• scoria
• basaltic glass

An extrusive igneous rock with a mineral composition of 35% quartz, 35% potassium feldspar, 15% plagioclase feldspar, 10% biotite, and 5% amphibole is called 

• rhyolite
• granite
• gabbro
• basaltic glass

Which igneous rock has a vesicular texture and a felsic composition? 

• pumice
• basalt
• granite
• scoria