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Paleontology Geological Dating

Mayank Karani

Ms. Evan's Class

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Across
1.The law that states if undisturbed and undeformed,oldest layer is on bottom (3 Words)
5.The amount of time necessary for one-half of the nuciei in a sample(parent)to decay to a stable isotope(daughter) (2 Words)
7.Fossils that are only found in sedimentary rocks ,they are widespread geographically,limited time span,also they occur in large numbers (2 Words)
8.The spontaneous radioactive decay of certain unstable nuclei, example - half-life
9.Its the idea that the same geological process shaping the earth today have been at work throughout earths history
10.The study of passed life
Down
2.The most precise geological dating method (2 Words)
3.Sediment usually deposited in horizontal layers,also it can be disturbed by forces (2 Words)
4.Is the methed for determining the age of living things (2 Words)
6.Is the seqeuence of events ,relational, chronological (2 Words)

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