List the important events and their dates, do your calculations here.

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List the important events and their dates, do your calculations here. Earth History Timeline 2/11/15 Catalyst: Create a personal timeline of your 13-14 years on earth with key events from your life. List the important events and their dates, do your calculations here. Reflection: 39/40 L 39/40 R

Imagine that the geologic time scale is contained in 1 calendar year (each second is around 146 years). January 1 is 4.6 billion years ago. The oldest known rocks are formed in early March The first forms of life (bacteria and algae) are preserved as fossils in late March The first multi-celled creatures (seaweed) appear on September 3 Phanerozoic Eon (most recent eon) begins on November 11 Reptiles appear on December 5 The first mammals appear December 14 Dinosaurs go extinct December 26 The first hominids (human-like ancestors) appear at 5 PM on December 31 (7 hours before midnight) The first modern humans (Homo sapiens) appear at 11:48 PM on December 31 (12 minutes to midnight) The last glacier receded at 11:58:45 p.m. on December 31 (1 minute and 15 seconds before midnight) Written history begins at 11:59:30 on December 31 (30 seconds before midnight) Columbus lands in the Americas 3 seconds before midnight You were born 1/10th of a second before midnight

What was something that surprised you about the timeline Earth History Timeline 2/11/15 Catalyst: Create a personal timeline of your 13-14 years on earth with key events from your life. Reflection: What was something that surprised you about the timeline 39/40 L 39/40 R