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Revision of Rock for Junior Cert Students

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Term
Definition
Mineral   A hard substance that forms naturally under the ground  
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Igneous   Rocks that are formed by the cooling of molten magma or lava  
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Crystals   Minerals that are mostly clear (transparent in colour and have a particular shape  
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Sedimentary   Rocks that are formed when sediments and the remains of plant and animal life are deposited and compacted  
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Fossil   Remains of sea creatures (shells and skeletons) that are preserved in the rock  
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Deposition   The process where sediments are laid down (dropped) by water (rivers or sea)  
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Metamorphic   Rocks that are formed when existing rocks are changed by heat and pressure  
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Permeable   when water is able to seep or pass through rocks  
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Strata   The layers in which the deposits that form some sedimentary rocks are laid down  
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Natural Resource   Something that occurs in nature and is of use to people  
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Marble   Metamorphic rock formed from limestone  
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Quartzite   Metamorphic rock formed from sandstone  
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Basalt   Rock formed when lava cooled quickly on the surface  
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Granite   Rock formed when lava cooled slowly beneath the surface  
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Slate   Rock that is used on roofs and snooker tables  
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Three   The number of groups rocks can be divided into  
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The Burren   Well known Limestone Region in Ireland  
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The Giants Causeway   40,000 hexagonal blocks of basalt in Co.Antrim  
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Created by: dxm1055
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