Difference between revisions of "Fossil"
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==Key Stage 3== | ==Key Stage 3== | ||
The remains of a dead creature that have been turned into [[rock]] over millions of years. | The remains of a dead creature that have been turned into [[rock]] over millions of years. | ||
Revision as of 08:11, 30 August 2018
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.
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| 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. |
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| 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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| This fossil comes from 12 million year old rocks. |
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Key Stage 3
The remains of a dead creature that have been turned into rock over millions of years.