Chapter 8 The History of Life on Earth

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Chapter 8The History of Life on Earth

• Conner
• Blackman High School

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The History of Life on Earth

1. Evidence of the Past
2. Eras of the Geological Time Scale
3. Human Evolution

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Chapter 8 Vocabulary
Precambrian Paleozoic Mesozoic Cenozoic
Primate Hominid Australopithecine Neanderthal
Fossil Relative Dating Absolute Dating Geological
Time Scale Extinct Plate Tectonics
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Evidence of the Past
Fossils and their Age Relative Dating Absolute
Dating Radioactive Decay and Half Life
Exercise Geologic Time Scale Eras are
characterized by the type of animal that
dominated the Earth at the time Changing Earth
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Eras of the Geologic Time Scale
4 main Eras (Precambrian, Paleozoic, Mesozoic and
Cenozoic Precambrian 4.6 billion years ago to
540 million years ago Air rich in CO, CO2, H,
and N Earths surface was in turmoil (UV
radiation, violent thunderstorms, meteorites,
etc.