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Ch3 Rocks

Prentice Hall Earth Science

QuestionAnswer
What is a rock? A rock is a solid mass of mineral or mineral like matter that occurs naturally in time.
What are the three major types of rocks? Sedimentary, Igneous, and Metamorhpic
How do the three rock types differ? Sedimentary is layered sediment, igneous is formed from cooled magma/lava, metamorhpic is heated sedimentary rocks.
What is magma? heated and melted rocks within the earth's mantle
What is the rock cycle? The change of one rock type to another in a never ending cycle.
What powers the rock cycle? Water, gravity, air, and earth's movement.
What is weathering? Erosion broken by water, air, and gravity.
How are intrusive igneous and extrusive igneous rocks different? Intrusive rocks form within the earth's surface. Extrusive rocks form on the surface of the Earth.
What is a sedimentary rock? A layered, compacted rock formed from eroded rocks.
What is erosion? Erosion is the weathering and reduction of rock size and mass.
What is compaction? Compaction is the process that squeezes sediments together.
What is cementation? When dissolved minerals are deposited into a new area and then hardened.
What is metamorhpism? the change among rocks within the cycle?
How does heat affect rocks? heat can change the physical composition of rocks.
What are the three agents of Metamorphism? Heat, Pressure, and Hydrothermal solutions
What are the classifications of igneous rocks? Coarse grained texture, Fine grained, glassy, porphyritic, granitic, basaltic, other.
What is the major process of sedimentary rock? Cementation and Compaction
What are alternate paths? Alternate paths are changes from the usual transformations within the rock cycle.
What causes the rock cycle for igneous rocks? heat from within the earth
What is the difference between lava and magma? lava is extrusive, magma is intrusive
Created by: jonathan.ivester
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