Difference between revisions of "Fossil"
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
− | [[Fossil]]s are | + | [[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. |
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+ | ===About Fossils=== | ||
+ | : Most [[animal]] [[fossil]]s come from the [[bone]]s, [[teeth]] and [[shell]]s 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]]. | ||
+ | |||
+ | ===Foss |
Revision as of 10:16, 21 November 2018
Contents
Key Stage 2
Meaning
A fossil is a piece of a dead creature that has turned into rock over millions of years.
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 animals it is usually only the bone that becomes a fossil.
Evidence of Evolution
- Fossils show us many creatures that do not exist anymore.
The Tyrannosaurus Rex is a Dinosaur that became extinct 66 million years ago. | The Giant Sloth lived in North America and became extinct 10,000 years ago at the end of the last Ice Age. |
The Dimetrodon became extinct long before the Dinosaurs even existed. | The Moa has only been extinct for about 500 years. |
- Fossils appear slightly different as you dig into older rocks. When you dig far enough the oldest fossils look very different to the modern creatures.
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Key Stage 3
Meaning
Fossils are the remains of a dead organisms that became trapped in sedimentary rock and turned into rock themselves over millions of years.
About Fossils
- Fossils 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 fossils of animals actually have the bones from lost of different members of the same species.
Key Stage 4
Meaning
Fossils are the remains of a dead organisms that became trapped in sedimentary rock and turned into rock themselves over millions of years.
About Fossils
- Most animal fossils come from the bones, teeth and shells of animals which have been trapped under layers of sedimentary rock. While there the biological material has been gradually replaced by minerals turning it into rock over millions of years.
- Some fossils are made when organisms become trapped in an anoxic environment where they cannot decay such as within amber, tar pits or under layers of ice.
===Foss