Quiz on Rocks and Petrology

What is a rock primarily composed of?

• A. Gases

• B. Solid aggregate of minerals

• C. Organic matter

• D. Water

What is the scientific study of rocks called?

• A. Geology

• B. Petrology

• C. Mineralogy

• D. Paleontology

Which type of rock is formed from the hardening of magma?

• A. Sedimentary

• B. Organic

• C. Metamorphic

• D. Igneous

What type of igneous rock cools quickly at the Earth's surface?

• A. Sedimentary

• B. Metamorphic

• C. Extrusive

• D. Intrusive

What process leads to the formation of sedimentary rocks?

• A. Cooling of magma

• B. Compaction of sediments

• C. Crystallization of minerals

• D. Metamorphism

What does the term 'foliation' refer to in metamorphic rocks?

• A. The size of the rock

• B. The color of the rock

• C. The age of the rock

• D. The arrangement of mineral grains

How are intrusive igneous rocks characterized?

• A. They cool quickly

• B. They have small crystals

• C. They are always dark in color

• D.They have large crystals

What is the primary agent of metamorphism?

• A. Heat and pressure

• B. Ice

• C. Water

• D. Wind

Which of the following is NOT a type of sedimentary rock?

• A. Igneous

• B. Chemical

• C. Clastic

• D. Organic

What happens during the compaction of sediments?

• A. They dissolve in water

• B. They evaporate

• C. They are heated

• D. They bind together under pressure