What is the primary purpose of the rock cycle?

• To show the relationship between different types of rocks and the processes that form them

• To describe the weather patterns on Earth

• To explain the history of Earth

• To identify the types of soil

How is igneous rock formed?

• Through the crystallization of magma

• By the erosion of existing rocks

• By the compaction of sediments

• Through the melting of ice

What determines the size of crystals in igneous rocks?

• The presence of water

• The amount of pressure applied

• The speed at which magma cools

• The type of sediment

Which process leads to the formation of sedimentary rocks?

• Crystallization of magma

• Compaction and cementation of sediments

• Melting of existing rocks

• Erosion by wind

What are examples of sedimentary rocks?

• Obsidian and granite

• Sandstone and limestone

• Quartz and amethyst

• Basalt and pumice

How are metamorphic rocks formed?

• By the cooling of lava

• Through the melting of ice

• From existing rocks under high heat and pressure

• By the deposition of sediments

What is a key characteristic of metamorphic rocks?

• They have aligned crystals in layers

• They are formed from lava

• They are composed of organic material

• They have large crystals

Which process involves the breakdown of rocks into smaller pieces?

• Weathering

• Metamorphism

• Crystallization

• Sedimentation

What is the process by which rocks are relocated on Earth's surface?

• Melting

• Crystallization

• Metamorphism

• Erosion

What is the role of heat and pressure in the rock cycle?

• They cause rocks to melt into magma

• They transform sedimentary and igneous rocks into metamorphic rocks

• They lead to the formation of sedimentary rocks

• They are responsible for the crystallization of magma