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Ch 3 Rocks

Prentice Hall Earth Science

QuestionAnswer
What is a rock? A rock is any solid mass of mineral or mineral-like matter that occuras naturally as part of our planet.
What are the three major types of rocks? The three major types of rocks are igneous, sedimentray, and metamorphic.
How do igneous rocks form? Igneous rocks form when magma or lava cools and solidifies.
How do sedimentary rocks form? Sedimentary rocks form when sediments are compacted and cemented.
How do metamorphic rocks form? Metamorphic rocks form when other rocks are changed by heat, pressure, or fluids.
What is the rock cycle? The rock cycle is the continuous process that causes rocks to change.
What powers Earth's rock cycle? Interactions among Earth's water, air, and land can cause rocks to change from one type to another.
What is magma? Magma is molten material that forms deep beneath Earth;s surface.
What is weathering? Weathering is a process in which rocks are physically and chemically broken down by water, air, or living things.
What are sediments? Sediments are weathered pieces of Earth's materials.
What are intrusive igneous rocks? Rocks that form when magma hardens benath Earth's surface.
What are extrusive igneous rocks? Rocks that are formed from hardened lava.
How do you classify igneous rocks? Igneous rocks are classified by the two characteristics: texture and composition.
What is erosion? Erosion is weathering and the removal of rock.
How do you classify sedmientary rocks? Sedimentary rocks are classified into the two main groups clastic and chemical sedimentary rocks.
What is deposition? Deposition is when an agent of erosion loses energy and drops sediments.
What is compaction? Compaction is a process that squeezes or compacts sediments.
What is cementation? Cementation takes place when dissolved minerals are depostied in the tiny spaces among the sediments.
What are the agents of metamorphism? The agents of metamorphism are heat, pressure, and hydrothermal solutions.
What are hydrothermal solutions? Hydrothermal solutions are water-based solutions that escape form a mass of magama.
Created by: zoe.dickinson
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