fossils: An animal that has been dead for many years and that type of animal is extinct

-the level of rock they're on determines how long they have been dead

-when the animal dies, over time they get covered with dirt, rock, or even sand and that is how they become a fossil.

-if two types of animals are in the same level of rock that shows that they both died almost at the same time.

the image below shows a fish that has died and over time, became a fossil.

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