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Bio Evolution 17

Biology Acc. Chaoter 17 BWHS

QuestionAnswer
Comares fossil's placement with that of fossils in other layers of rock. Relative Dating
Used to assign absolute age to rocks, measures the amount of a radioactive isotope Radioactive Dating
Gives a Relative Age Relative Dating
An atom with more neutrons in the nucleus than it's "element" form, that produces energy when broken up, and is chemically unstable Isotope
Length of time it takes for half of a radioactive sample to decay at a constant rate Half Life
5,730 years Half Life of Carbon 14
The Earth is 4.6 billion years old, the Earth formed by collisions of cosmic dust Formation of the Earth
Solid Core - Molten Layer - Crust Earth's Layers
CO2, CO, H2O, N, H2S - gases produced by volcanic eruptions and the cooling molten Earth Earth's First Atmosphere
Oceans and Lakes form - the Earth cools enough for water to remain liquid, the first sedimentary rocks formed About 3.8 billion years ago
Created by: Libbio
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