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You get to the same file if you click on the blue link that says fossil cards.

This interactive asks you to use your knowledge of relative dating. Help us work out the relative ages of the layers of sedimentary rocks.

When ‘parent’ uranium-238 decays, for example, it produces subatomic particles, energy and ‘daughter’ lead-206.

These break down over time in a process scientists call radioactive decay.

Absolute age dating is like saying you are 15 years old and your grandfather is 77 years old.

To determine the relative age of different rocks, geologists start with the assumption that unless something has happened, in a sequence of sedimentary rock layers, the newer rock layers will be on top of older ones. This rule is common sense, but it serves as a powerful reference point.

Although most attention in today's world focuses on dinosaurs and why they became extinct, the world of paleontology includes many other interesting organisms which tell us about Earth's past history.

The study of fossils and the exploration of what they tell scientists about past climates and environments on Earth can be an interesting study for students of all ages.

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In the contents below you will find them divided up accordingly. This is an ongoing project that I plan to add to regularly.

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