Understanding Rocks and the Rock Cycle

What sparked the narrator's interest in rocks?

• A childhood rock collection

• A school project

• A family trip to a volcano

• A geology class in college

What is the main difference between intrusive and extrusive igneous rocks?

• Their size

• Where they cool and solidify

• Their mineral content

• Their color

How can you typically identify sedimentary rocks?

• By their grainy texture

• By their shiny surface

• By their color

• By their magnetic properties

What tool is commonly used by geologists to examine sedimentary rocks?

• A hand lens

• A thermometer

• A compass

• A seismograph

What process turns sediment into sedimentary rock?

• Metamorphism

• Weathering

• Erosion

• Lithification

What is the primary cause of mechanical weathering?

• High temperatures

• Magnetic fields

• Direct physical contact

• Chemical reactions

Which of the following is an example of chemical weathering?

• Freeze-thaw cycles

• Acid rain dissolving minerals

• Glacial movement

• Wind erosion

What is the main process that transforms sedimentary rocks into metamorphic rocks?

• Erosion

• Deposition

• Heat and pressure

• Cooling

What is the rock cycle?

• A process of rock formation

• A model of how rocks are recycled

• A method of mining rocks

• A type of sedimentary rock

What happens to rocks during metamorphism?

• They become sediment

• Their minerals are transformed

• They are eroded by wind

• They melt completely