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But when laid on the ground, they are fixed to the position that the north magnetic pole was at the time.If we look at what coordinates are oriented such minerals at the site, we can associate it with a particular time.When finished, you will be able to: Fossils provide scientists with many clues about Earth's history, offering evidence of dinosaurs and strange plants that existed in the past.

In diffusion, the molecules move from a place with high density to a place with lower density, while in active uptake the opposite happens. There are many methods to determine how closely related two species may be.

Two major dating methods applied to artifacts and fossils are stratagraphic dating (based upon the particular layer of rock of sediment in which the object is found) or radiometric dating (which is based on the decay rates of certain radioactive… The first is relative dating which examines the layers of rock around the fossil to find an approximate date.

The other is absolute dating, which measure the decay of carbon atoms.

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