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Moorland School: Earth Science Zone: The Origin of the Earth
A webpage reviewing the origin of the Earth. Learn what Earth was like during its first billion years with an atmosphere that contained no oxygen. Understand that oxygen levels built up once green plants became more abundant. At the end...
US Geological Survey
Usgs: What Is Geologic Time?
Understand the evidence for ancient earth and the geologic time scale. Learn on this site how the earth can help scientist date discoveries.
TED Talks
Ted: Ted Ed: Four Ways to Understand the Earth's Age
The Earth is 4.6 billion years old- but how can humans relate to a number so colossal, and where do we fit on the geologic timeline? Joshua Sneideman reminds us of our time and place in the universe. [3:45]