Table of Contents Title: Geologic Time Page #: 14 Date: 11/14/2013.

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Presentation transcript:

Table of Contents Title: Geologic Time Page #: 14 Date: 11/14/2013

Objective Students will be able to explain the Geologic eons and eras.

Words of the Day Eon: The longest division of geologic time Era: A distinctive period of time.

Geologic Time Geologic Time - Used to refer to events in the history and formation of the earth. 4 Main divisions called “eons”: Hadean: 4.6 to 4 Billion years ago. Archaen: 4 Billion to 2.5 Billion years ago Proterozoic: 2.5 Billion to 570 Million years ago Phanerozoic: 570 Million years ago to now

Geologic Time Hadean, Archaen, Proterozoic are called the Precambrian Era: makes up 88% of geologic time. Phanerozoic - is the eon where fossils are found. Phanerozoic is divided into 3 eras: Paleozoic era - “ancient life” Mesozoic era - “middle life” Cenozoic era - “recent life” Fossil Record

Make sure You have This print Out.

Geologic Time Geologic time is so big that it is hard to understand. Earth is 4.6 Billion years old Vertebrates - animals with a spinal column first appeared 500 million years ago. What does that mean?