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Rock
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==Key Stage 2==
===Meaning===
'''Rock''' is a hard, stiff and firm material made of [[Rock Crystal|crystals]] or [[Rock Grain|grains]].
===About Rock===
: Some '''rocksRock''' are is made of from [[grainRock Grain|grains]] which are tiny pieces of rock with rounded edges that are stuck together.: Some '''rocks''' have [[Rock Crystal|crystals]] inside them which are small shiny pieces of rock with grains that have sharp edges that . You can often see [[Rock Crystal|crystals]] because they are stuck togethershiny and sparkle like glitter.: Whether The shape of [[Rock Grain|grains]] in the '''rock''' is made from [[Grain|grains]] or depends on how it was formed.: The size of [[Rock Crystal|crystals]] also depends on how the '''rock ''' formed.: '''Rock''' formed at the bottom of a lake or the sea has rounded [[grainRock Grain|grains]] inside it while .: '''rockRock''' formed near [[Volcano|volcanoes]] has lots of [[Rock Crystal|crystals]].
===Examples===
{| class="wikitable"
|-
|[[File:PictureLimestone.png|center|200px]]|[[File:PictureMudstone.png|center|200px]]|[[File:Sandstone.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |TextThis limestone has lots of rounded [[Rock Grain|grains]] and was formed at the bottom of the ocean.| style="height:20px; width:200px; text-align:center;" |This mudstone formed at the bottom a lake and has rounded [[Rock Grain|grains]].| style="height:20px; width:200px; text-align:center;" |TextSandstone is made of rounded [[Rock Grain|grains]] of sand stuck together.
|-
|[[File:PictureBasalt.png|center|200px]]|[[File:PictureGranite.png|center|200px]]|[[File:Quartz.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |TextThis basalt has lost of very small [[Rock Crystal|crystals]] inside it and formed form a [[volcano]].| style="height:20px; width:200px; text-align:center;" |TextGranite formed from [[magma]] stuck underground near a [[volcano]] and has [[Rock Crystal|crystals]] inside it.| style="height:20px; width:200px; text-align:center;" |Quartz is a very large [[Rock Crystal|crystals]] rock formed near [[Volcano|volcanoes]].
|}