Chapter 3 Rocks

What causes rocks to change from one type to another?

• The rock cycle

• The water cycle

• The carbon cycle

• The nitrogen cycle

What forms when magma cools and hardens beneath the surface?

• Extrusive igneous rock

• Intrusive igneous rock

• Sedimentary rock

• Metamorphic rock

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What is magma?

• Solid rock on Earth's surface

• Molten material beneath Earth's surface

• Weathered rock pieces

• Hardened lava

What is the process called when an agent of erosion loses energy and drops sediments?

• Compaction

• Cementation

• Deposition

• Erosion

What process squeezes or compacts sediments?

• Erosion

• Cementation

• Compaction

• Deposition

What determines the grouping of clastic sedimentary rocks?

• Color

• Size of the sediments

• Mineral composition

• Age

What is the main agent that causes erosion and removal of rock?

• Fire

• Water, wind, ice, or gravity

• Earthquakes

• Volcanic activity

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What conditions are necessary for most metamorphic changes to occur?

• Low temperatures and pressures

• Elevated temperatures and pressures

• High humidity and low pressure

• Low temperatures and high pressure

What happens during contact metamorphism?

• Rocks melt completely

• Hot magma moves into rock

• Rocks are eroded by water

• Rocks are compressed by glaciers

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Where are the conditions for metamorphic changes typically found?

• On the Earth's surface

• A few kilometers below Earth's surface

• In the ocean

• In the atmosphere