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Earth’s Age - How We Know Earth is 4.55 Billion Years Old

GEO GIRL via YouTube

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This course explains how geologists determined Earth’s age using relative dating, radioactive isotopes, half-lives, and radiometric dating. It covers early estimates, the rocks and meteorites used for dating, and evidence corroborating an age of 4.55 billion years.

Syllabus

Video Outline
What is Absolute Dating?
What is a Radioactive Isotope?
How we use Half Lives to Date Rocks
? How the Geologic Timescale was made
? Early Estimates of Earth’s Age
? After Radioactive Decay Discovery
Oldest Rocks on Earth
How we Know Earth is 4.5 Ga
How the Universe was Dated
Earth History Confirms Earth’s Age
Related Videos & References

Taught by

GEO GIRL

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