Rocks

Descripción

year 8 Science Fichas sobre Rocks, creado por lilygowen el 08/06/2015.
lilygowen
Fichas por lilygowen, actualizado hace más de 1 año
lilygowen
Creado por lilygowen hace más de 10 años
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Resumen del Recurso

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What are the three types of rock? Igneous, Sedimentary and metamorphic
What does weathering do? Gradually breaks down the rock
What does erosion do? It erodes the rock.
what does transportation do? it moves the rock to another place.
How long does the rock cycle take? Millions of years.
What do volcano erupt? Lava
what are the three types of erosion? Physical- waves, wind, freezing Biological- weeds, burrowing animals Chemical- acid rain, minerals+water
How is igneous rock formed? from magma from the molten interior of the earth erupts and cools to form volcanic landforms.
Example of igneous rock. Granite or basalt
what are rocks on the outside of the earth called? extensive
what is intrusive and extrusive? Intrusive - small crystals (slow cool) Extrusive - large crystals (fast cool)
How is metamorphic rock formed? they are exposed to a lot of heat or pressure causing them to morph into another. They are usually resistant to weathering.
Example of metamorphic rock. Marble, limestone
How are sedimentary rocks formed? the eroded rocks get crushed and crushed and crushed until they form a rock.
examples of sedimentary rock. Chalk and snadstone
what moves tectonic plates? convection currents
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