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How we Know Earth is 4.5 Ga
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Earth’s Age - How We Know Earth is 4.55 Billion Years Old
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- 1 Video Outline
- 2 What is Absolute Dating?
- 3 What is a Radioactive Isotope?
- 4 How we use Half Lives to Date Rocks
- 5 ? How the Geologic Timescale was made
- 6 ? Early Estimates of Earth’s Age
- 7 ? After Radioactive Decay Discovery
- 8 Oldest Rocks on Earth
- 9 How we Know Earth is 4.5 Ga
- 10 How the Universe was Dated
- 11 Earth History Confirms Earth’s Age
- 12 Related Videos & References
