Rocks

Which of the following is true about rocks?

• Rocks are composed of only one mineral.

• Rocks do not contain minerals.

• Coal is not considered a rock.

• Most rocks are a mixture of minerals.

Which of the following is NOT one of the three types of rock?

• Igneous

• Magma

• Sedimentary

• Metamorphic

Metamorphic rock forms as a result of:

• Heat and Pressure

• Compaction of sediments

• The cooling of magma

• The melting of rock

A rock that forms when magma hardens beneath Earth's surface is called an:

• Intrusive metamorphic rock.

• Intrusive igneous rock.

• Extrusive sedimentary rock.

• Extrusive igneous rock.

Which of the following is an example of an extrusive igneous rock?

• Basalt

• Sandstone

• Coal

• Granite

Lava that cools so quickly that crystals do not have time to form will lead to igneous rocks with a

• Porphyritic texture

• Coarse-grained texture

  
  

• Fine-grained texture

• Glassy texture

Which of the following represents the correct order of the processes responsible for the formation of sedimentary rocks?

• Erosion, weathering, compaction, cementation, deposition

• Compaction, cementation, deposition, weathering, erosion

• Deposition, cementation, compaction, erosion, weathering

• Weathering, erosion, deposition, compaction, cementation

Fossils are found only in:

• Intrusive igneous rocks

• Sedimentary rocks.

• Metamorphic rocks.

• Extrusive igneous rocks.

What rock-forming process occurs when hot magma comes near and heats up rock?

• Contact metamorphism

• Regional metamorphism

• Biochemical sedimentation

• Deposition

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 to:

• An extrusive igneous rock

• A sedimentary rock

• An intrusive igneous rock

• A metamorphic rock