Understanding Rocks: Types and the Rock Cycle

What are rocks primarily composed of?

• Synthetic materials

• Naturally occurring minerals

• Plastic compounds

• Artificial substances

Which type of igneous rock is known for its dark color?

• Rhyolite

• Mafic

• Granite

• Felsic

How are intrusive igneous rocks formed?

• From cooled lava above ground

• From weathered sediments

• From rapidly cooled magma

• From slowly cooled magma

What process leads to the formation of sedimentary rocks?

• Heat and pressure

• Crystallization

• Weathering, erosion, and deposition

• Melting and cooling

What is stratification in sedimentary rocks?

• The cooling of magma

• The arrangement of layers

• The formation of crystals

• The process of melting

What causes metamorphic rocks to form?

• Heat and pressure

• Deposition of sediments

• Weathering and erosion

• Cooling of lava

Which type of metamorphism is caused by heat from nearby magma?

• Dynamic metamorphism

• Contact metamorphism

• Regional metamorphism

• Thermal metamorphism

What is the main characteristic of foliated metamorphic rocks?

• Aligned grains of flat minerals

• Random mineral arrangement

• Lack of mineral grains

• Presence of fossils

What happens to igneous rocks during the rock cycle when they undergo weathering and erosion?

• They crystallize

• They melt into magma

• They become metamorphic rocks

• They form sediments

How does sedimentary rock transform into metamorphic rock?

• Through crystallization

• Through heat and pressure

• Through weathering

• Through melting