
When a plant or animal dies the remains break down in the soil. This is called decomposition.

If an animal or plant dies and breaks down on rock it can leave an outline of the shape on a rock. This is called a fossil.



Here are more examples of fossils.
Over thousands of years the Earth’s surface has changed. One of the things that has caused great change is a volcanic eruption.

There are eighteen dangerous volcanos in the United States. The volcano that is rated the most dangerous is Hawaii’s Mount Kilauea.

Volcanos can change the surface of the Earth.

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When a plant or animal dies the remains break down in the soil. This is called decomposition.

If an animal or plant dies and breaks down on rock it can leave an outline of the shape on a rock. This is called a fossil.



Here are more examples of fossils.
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