Changes

| style="height:20px; width:300px; text-align:center;" |The [[Tyrannosaurus Rex]] is a [[Dinosaur]] 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]].

| style="height:20px; width:300px; text-align:center;" |The [[Dimetrodon]] became [[extinct]] long before the [[Dinosaurs]] dinosaurs even existed.| style="height:20px; width:300px; text-align:center;" |The [[Moa]] has only been [[extinct]] for about 500 years.

: Fossils [[Fossil]]s appear slightly different as you dig into older rocks. When you dig far enough the oldest fossils [[fossil]]s look very different to the modern creatures.

: Most [[animal]] [[fossil]]s come from the [[bone]]s, [[teeth]] and [[shell]]s shells of [[animal]]s which have been 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 Pit|tar pits]] or under layers of [[ice]].

===FossFossils 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 '']