'Read geologic time' presentation slideshows

Aim: How do Geologist break-up Geologic Time? Do Now: - Take out your ESRT and turn to page 8-9

Aim: How do Geologist break-up Geologic Time? Do Now: - Take out your ESRT and turn to page 8-9 Earth has existed for 4.7 billion years. If this 4.7 billion years were to be scaled down to a 12 hour clock, then how much time on that clock do you think Humans have existed?

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