Rock and Mineral Review 1

If you have a sample of granite, gneiss and sandstone, what minerals could be found in all 3?

• Garnet and Quartz

• Mica and Pyroxene

• Feldspar and Quartz

• Amphibole and Pyroxene

Tags

NGSS.MS-PS1-1

A student created the table below by classifying six minerals into two groups, A and B , based on a single property.

• color

• luster

• chemical composition

• hardness

Which characteristic of rocks tends to increase as the rocks are metamorphosed?

• density

• porosity

• permeability

• number of fossils present

The three statements below are observations of the same rock sample:

• The rock has intergrown crystals from 2 to 3 millimeters in diameter.

• The minerals in the rock are gray feldspar, green olivine, green pyroxene, and black amphibole.

• There are no visible gas pockets in the rock.

This rock sample is most likely

• sandstone

• gabbro

• granite

• phyllite

A student obtains a cup of quartz sand from a beach. A saltwater solution is poured into the sand and allowed to evaporate. The mineral residue from the saltwater solution cements the sand grains together, forming a material that is most similar in origin to

• an extrusive igneous rock

• an intrusive igneous rock

• a clastic sedimentary rock

• a foliated metamorphic rock

What is the origin of fine-grained igneous rock?

• lava that cooled slowly on Earth's surface

• silt that settle slowly in ocean water

• silt that settles quickly in ocean water

• lava that cooled quickly on Earth's surface

Which two process formed this rock?

• melting and solidification

• heating and pressure

• compaction and cementation

• folding and faulting

A fine-grained igneous rock composed mostly of plagioclase feldspar and hornblende and containing no quartz or pyroxene would be classified as

• granite

• andesite

• peridotite

• scoria

What are two differences between the igneous rocks granite and gabbro?

• grain size and color

• color and density

• environment of formation and color

• texture and density

Looking at the compositions of a large number of sedimentary, igneous and metamorphic rocks, what conclusion can be made?

• The minerals in igneous rocks are different that those in sedimentary and metamorphic.

• Most rocks only contain one mineral.

• All rocks are made of more than one mineral.

• Many rock types have a lot of minerals in common.