Chemical and Biochemical Sedimentary Rocks Quiz

What is the main difference between chemical and biochemical sedimentary rocks?

• Chemical rocks form inorganically, while biochemical rocks form through organic processes.

• Chemical rocks form through evaporation, while biochemical rocks form through precipitation.

• Chemical rocks form in marine environments, while biochemical rocks form in freshwater environments.

• Chemical rocks form through volcanic activity, while biochemical rocks form through metamorphism.

What is the dominant mineral in carbonate rocks?

• Quartz

• Feldspar

• Calcite

• Gypsum

Where do most limestone formations occur?

• In polar regions

• In tropical continental shelves

• In volcanic regions

• In deserts

What type of organisms contribute to the formation of limestone in marine environments?

• Mammals

• Reptiles

• Corals and algae

• Birds

What is the main difference between tufa and travertine?

• Tufa is porous, while travertine is less porous.

• Tufa forms in caves, while travertine forms in lakes.

• Tufa is white, while travertine is brown.

• Tufa forms at hot springs, while travertine forms at springs.

How can calcite and dolomite be distinguished from each other?

• By their crystal structure

• By their reaction to acid

• By their density

• By their color

What is the main characteristic of banded iron formations (BIFs)?

• They contain alternating layers of iron oxide and chert

• They are formed by volcanic eruptions

• They are rich in silica

• They are formed in arid regions

What causes the formation of evaporites in arid regions?

• Low temperature

• High concentration of dissolved salts

• Low evaporation

• High precipitation

What is the dominant mineral in silicate rich rocks?

• Quartz

• Gypsum

• Feldspar

• Calcite