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Lauren's rock cycle cards
n/a
19
Science
4th Grade
06/02/2009

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Term
basalt
Definition
A type of igneous rock. It is the most common rock type in the earth's crust and makes up most of the ocean floor.
Term
Conglomerate
Definition
A type of sedimentary rock made up of pebbles, stones, and smaller particles pressed together by the action of waves or water.  Finding a bed of this rock is a great clue that a river or beach once existed in that location.

Term
Erosion
Definition
The process by which soil, sediment, and small pieces of rock are carried away from their original locations and transferred elsewhere by the actions of wind, water, ice, or living organisms.

Term
limestone
Definition
A type of sedimentary rock often found near oceans and lakes.  Often contains imprints of shells or othe fossils. 

Term
igneous
Definition
One of the three main rock types, formed from the cooling and hardening of magma.
Term
magma
Definition
Hot, molten rock found deep inside the earth.

Term
marble
Definition
A type of metamorphic rock formed when limestone is pushed down into the earth and subjected to intense heat and pressure for a long period of time.  Often used in scupture or buildings and has colors running through it that look like veining. 


Term
metamorphic rocks
Definition
One of the three main rock types, formed deep within the earth, where rock material is subjected to intense heat and pressure (squeezing). The rocks that result from these processes often have ribbonlike layers and may have shiny crystals on their surface, formed by minerals growing slowly over time.


Term
obsidian
Definition
A type of extrusive igneous rock, created from lava that cools so quickly that no crystals form on its glass like surface.
Term
the rock cycle
Definition
The recurring series of events that rocks undergo, over time, that transforms them from one type to another.

Term
weathering and erosion
Definition
 

the wind, water, the sun, temperature changes acting on rocks to wear them and break them apart, creating sediment.
Term
sedimentary rock
Definition
One of the three main rock types, formed from particles of sand, shells, pebbles, and other fragments of material. These materials accumulate in layers and over a long period of time and harden into rock.


Term
extrusive igneous rock
Definition
rock formed by lava that squeezes out on the surface of the earth and cools
Term
intrusive igneous rock
Definition
this rock is formed from magma that cools slowly below the surface of the earth. 
Term
compacting and cementing
Definition
Processes forming sedimentary rock:  sediment accumulates, building up layers that weigh down the material underneath. The weight presses the sediment particles together and water flowing through the particles sticks them together. 
Term
igneous
Definition
What type of rock is formed by melting and cooling?
Term
metamophic rock
Definition
What type of rock is formed by pressure and heat (not hot enough to melt it)?
Term
Sedimentary
Definition
What type of rock is formed after weathering and erosion of materials occurs on other types of rock?
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