Absolute time dating

Here is an easy-to understand analogy for your students: relative age dating is like saying that your grandfather is older than you.

Absolute age dating is like saying you are 15 years old and your grandfather is 77 years old.

Throughout the centuries mankind has striven to try to determine the exact age of Earth.

What these people were seeking was a numerical date of Earths age.

Therefore, we can obtain numeric dates of many rocks that represent important events in Earths distant past.

However, prior to the discovery of radioactivity, geologists had no proven method of numerical dating and instead had to rely solely on relative dating.

Mountains, erosion, and variations in climate were considered to be punishment for the sins committed by humanity.

Yet, you’ve heard the news: Earth is 4.6 billion years old. That corn cob found in an ancient Native American fire pit is 1,000 years old. Geologic age dating—assigning an age to materials—is an entire discipline of its own.

Chronological Analysis of the Scriptures- Literal interpretation of the scriptures led some people to conclude that the Earth was created approximately 6,000 years old.

In fact, Archbishop Usher of Ireland calculated that the Earth was created at 9 AM on It was believed that prior to the Great Flood, Earths surface was flat and its climate was mild.

He calculated the modern rate of salt delivery to the oceans, and suggested that the present salinity of ocean water would take at least 100 million years to develop.

In the 1860's, English physicist Lord Kelvin disagreed with Charles Lyells proposition that the earth behaves in a uniform, unchanging manner.

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