Rocks (and Minerals) Unit Summative Test

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

Tags

NGSS.MS-ESS2-1

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

Tags

NGSS.MS-PS1-1

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

The data table gives characteristics of the gemstone peridot.

Peridot is a form of the mineral

• pyrite
• olivine
• pyroxene
• garnet

Tags

NGSS.MS-PS1-1

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

The hardness and density of each gemstone is based primarily on the gemstone’s  

• internal arrangement of atoms
• oxygen content
• geologic time of formation
• natural abundance

Tags

NGSS.MS-PS1-1

Part of a gemstone’s value is based on the way the gemstone shines in reflected light. The way a mineral reflects light is described as the mineral’s 

• luster
• streak
• fracture
• hardness

Tags

NGSS.MS-PS4-2

According to the Earth Science Reference Tables, which

sedimentary rock would be formed by the compaction and cementation of particles 1.5 centimeters in diameter?

A) shale

B) conglomerate

C) siltstone

D) sandstone

• A

• B

• C

• D

According to the Earth Science Reference Tables, which

graph best represents the comparison of the average grain sizes in basalt, granite, and rhyolite?

• A

• B

• C

• D