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==Key Stage 2=====Meaning===[[File:Fossil.png|right|300px|thumb|The '''fossil''' of an [[animal|animal's]] [[Skeletal System|skeleton]].]]A '''fossil''' is a piece of a dead creature that has turned into [[rock]] over millions of years.: Singular [[Noun]]: '''Fossil''': Plural [[Noun]]: '''Fossils''': [[Adjective]]: '''Fossilised''' ===About Fossils===: A '''fossil''' begins as a creature that dies and falls into mud or sand.: Over millions of years the mud or sand turns into a [[rock]] with the creature trapped inside.: The creature is replaced by minerals leaving a [[rock]] that is the same shape as the creature.: In [[animal|animals]] it is usually only the bone that becomes a '''fossil'''. ===Evidence of Evolution===: [[Fossil]]s show us many creatures that do not exist anymore.{| class="wikitable"|-|[[File:TyrannosaurusFossil.png|center|300px]]|[[File:GiantSlothFossil.png|center|200px]]|-| style="height:20px; width:300px; text-align:center;" |The Tyrannosaurus Rex is a dinosaur that became [[extinct]] 66 million years ago.| style="height:20px; width:300px; text-align:center;" |The Giant Sloth lived in North America and became [[extinct]] 10,000 years ago at the end of the last [[Ice Age]].|-|[[File:DimetrodonFossil.png|center|300px]]|[[File:MoaFossil.png|center|200px]]|-| style="height:20px; width:300px; text-align:center;" |The Dimetrodon became [[extinct]] long before the dinosaurs even existed.| style="height:20px; width:300px; text-align:center;" |The Moa has only been [[extinct]] for about 500 years.|} : [[Fossil]]s appear slightly different as you dig into older rocks. When you dig far enough the oldest [[fossil]]s look very different to the modern creatures. {| class="wikitable" |-|[[File:HorseFossil4.png|center|300px]]|[[File:HorseFossil3.png|center|300px]]|-| style="height:20px; width:300px; text-align:left;" |: Modern horse fossils are only found in rocks younger than 2 million years old.: They are around 6 feet tall, have hooves and a large nose.| style="height:20px; width:300px; text-align:left;" |: This fossil comes from 7 million year old rocks.: It is shorter and has a smaller nose than modern horses.: You do not find modern horse fossils in rocks this age.|-|[[File:HorseFossil2.png|center|300px]]|[[File:HorseFossil1.png|center|300px]]|-| style="height:20px; width:300px; text-align:left;" |: This fossil comes from 12 million year old rocks.: It has a small hoof but toes next to the hooves. It is also much shorter than modern horses.| style="height:20px; width:300px; text-align:left;" |: This fossil comes from 34 million year old rocks.: This ancestor of modern horses had toes without a hoof and was the size of a dog.|} ==Key Stage 3=====Meaning===[[Fossil]]s are the remains of a dead creature [[organism]]s that became trapped in [[sedimentary]] rock and turned into rock themselves over millions of years. ===About Fossils===: [[Fossil]]s are only found in [[sedimentary]] rocks but not in [[igneous]] rocks.: It is very rare to find a complete [[fossil]] of a large [[animal]]. Most [[fossil]]s of [[animal]]s actually have the bones from lost of different members of the same [[species]]. ==Key Stage 4=====Meaning===[[Fossil]]s are the remains of a dead [[organism]]s that became trapped in [[sedimentary]] rock and turned into rock themselves over millions of years. ===About Fossils===: Most [[animal]] [[fossil]]s come from the [[bone]]s, [[teeth]] and shells of [[animal]]s which have been turned trapped under layers of [[sedimentary]] [[rock]]. While there the biological material has been gradually replaced by [[mineral]]s turning it into [[rock]] over millions of years.: Some [[fossil]]s are made when [[organism]]s become trapped in an [[anoxic]] environment where they cannot [[decay]] such as within amber, tar pits or under layers of [[ice]]. ===Fossils as Evidence===: [[Fossil]]s are one of the lines of [[Scientific Evidence|scientific evidence]] for [[Evolution by Natural Selection|evolution]].: Since [[sedimentary]] [[rock]]s build up in layers over time [[fossil]]s found in deeper layers are from further in the past. This can be used to date the [[fossil]]s telling us when the [[organism]] died.: [[Fossil]]s provide a number of transitional forms showing how some [[species]]s which are not [[extinct]] gradually [[Evolution by Natural Selection|evolved]] over time to form the [[species]] that are alive today.: The [[fossil]] record is not complete as [[Fossil|fossilisation]] is a rare process, so very few [[organism]]s become [[fossil]]s after death. However, there are enough records to show clear [[Scientific Evidence|evidence]] of [[Evolution by Natural Selection|evolution]]. ===References=======AQA==== :[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f306 ''Fossil, page 280-3, GCSE Biology; Student Book, Collins, AQA '']:[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Fossils, page 101, GCSE Biology; The Revision Guide, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1471851338/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851338&linkCode=as2&tag=nrjc-21&linkId=425855d5890466e47189e1c21b67a1ea ''Fossils, pages 219-20, GCSE Biology, Hodder, AQA '']:[https://www.amazon.co.uk/gp/product/1782946381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946381&linkCode=as2&tag=nrjc-21&linkId=5ec5fc3f6429e30c1d9ab9bca2bccf93 ''Fossils, pages 243, 244, GCSE Combined Science Trilogy; Biology, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''Fossils, pages 301, 302, GCSE Biology, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Fossils, pages 59, GCSE Combined Science Trilogy 2, Hodder, AQA ''] ====Edexcel==== :[https://www.amazon.co.uk/gp/product/1782948120/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948120&linkCode=as2&tag=nrjc-21&linkId=dedef775c6a43dbb0a609441525adac0 ''Fossils, pages 126, 130, 131, 134, GCSE Biology, CGP, Edexcel '']:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Fossils, pages 32, 33, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']:[https://www.amazon.co.uk/gp/product/1782946748/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946748&linkCode=as2&tag=nrjc-21&linkId=a4f0348fc37d0ba1bb52d27f8679581f ''Fossils, pages 45, 47, GCSE Biology; The Revision Guide, CGP, Edexcel ''] ====OCR====:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Fossils, page 55, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']:[https://www.amazon.co.uk/gp/product/1782945660/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945660&linkCode=as2&tag=nrjc-21&linkId=83aa4500ad7759e7f401a1c5ba5df758 ''Fossils, page 74, Gateway GCSE Biology; The Revision Guide, CGP, OCR '']