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Morisco
Rock Cycle
18
Science
6th Grade
11/20/2008

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Term
The Rock Cycle
Definition
The rock cycle is a process in which: A rock forms,changes from one type of rock to another, forms again by processes on and in the Earth.
Term
Sedimentary Rock
Definition
Sedimentary Rock is formed by weathering and erosion of rocks into smaller pieces or sediment. They are deposited , compacted and cemented togeter by pressure, into layers.
Term
Igneous Rock
Definition
Igneous rocks (from the Greek word for fire) form from hot molten rock (magma).The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface
Term
Metamorphic Rock
Definition
Metamorphic rocks are rocks that have "morphed“, or changed into another kind of rock. These rocks were once igneous or sedimentary rocks. Heat and pressure squeeze the sedimentary or igneous rock and change it into.
Term
Weathering
Definition
Breakdown of rock by water, constant heating and cooling or other natural causes, to form sediment.
Term
Erosion
Definition
Movement of sediment by wind and water
Term
Compaction
Definition
Sediment is squeezed together
Term
Cementation
Definition
Rock that is cemented together into one rock
Term
Sediments
Definition
Pieces of broken rock, sand, remains of plants and animals that are weathered and eroded.
Term
Intrusive Igneous Rock
Definition
Intrusive, or plutonic igneous rock forms when magma is trapped deep inside the Earth. It cools very slowly over many thousands or millions of years until it solidifies. Intrusive igneous rock can be pushed to the surface by plate movement.
Term
Extrusive Igneous Rock
Definition
Extrusive igneous rock is produced when magma exits and cools outside of, or very near the Earth's surface. These are the rocks that form at erupting volcanoes.
Term
Deposition
Definition
Streams and rivers transport sediment to lakes or oceans, or deposit it on nearby floodplains where it accumulates
Term
Magma
Definition
The hot liquid that forms when rock partially or completely melts.
Term
Heat and Pressure
Definition
Change the structure and texture of rock. This is what changes sedimentary rock into metamorphic rock.
Term
Melting
Definition
Melting rock completely cause metamorphic rock to turn into Magma
Term
Lava
Definition
Lava is magma that has come out of the earth's surface
Term
Cooling
Definition
When Magma cools and solidifies it forms a new igneous rock.
Term
Texture
Definition
Size, shape and positions of thegraisn determine texture
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