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Ch3 Earths Resources

Prentice Hall Earth Science

QuestionAnswer
What is a rock? A rock is a mass of mineral or mineral-like matter that occurs naturally as part of our planet.
What are the three major rock types? The three major rock types are igneous, metamorphic, and sedimentary rocks.
What is the rock cycle? The rock cycle is the 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.
How does igneous rock form? Igneous rock forms when magma cools and hardens beneath the surface or as the result of a volcanic eruption.
What is weathering? Weathering is a process in which rocks are physically and chemically broken down by water, air, and living things.
How does sedimentary rock form? Sedimentary rock forms when sediments are compacted and cemented.
How does metamorphic rock form. Metamorphic rock forms when sedimentary rock is put under extreme pressure and temperature conditions.
What is intrusive igneous rock? Intrusive igneous rocks are rocks that form when magma hardens beneath Earth's surface
What is extrusive igneous rocks? Extrusive igneous rocks are rocks that form when lava hardens.
What two characteristics are used to classify igneous rocks? Texture and composition are two characteristics used to classify igneous rocks.
What is compaction? Compaction is a process that squeezes, or compacts, sediments.
What is cementation? Cementation takes place when dissolved minerals are deposited in the tiny spaces among the sediments.
How are sedimentary rocks classified? Sedimentary rocks are classified by by two categories, clastic and chemical sedimentary rocks.
What are clastic sedimentary rocks? Clastic sedimentary rocks are rocks that contain many different minerals and sediments.
What are chemical sedimentary rocks? Chemical sedimentary rocks form when dissolved substances precipitate, or separate, from water solution.
What is metamorphism? Metamorphism is when process that means to change form.
What is contact metamorphism? Contact metamorphism is when magma intrudes rock.
What are the agents of metamorphism? The agents of metamorphism are heat, pressure, and hydro thermal solutions.
What kind of texture can metamorphic rocks give? Metamorphic rocks can have textures that are foliated or nonfoliated.
Created by: ahmad65462
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