1. History of the Earth
                                                   

2. Add to table of contents:
Bio-Geological Timeline Pg. 38
History of the Earth Pg. 39

3. History of the Earth Pg. 39 Earth “began” 4.6 Bya
4 Geological Time Breakdowns:
Precambrian Time
Paleozoic Era
Mesozoic Era
Cenozoic Era

4. 1.Precambrian Time – 4.6 Bya-542 Mya
-Hadean Era 4.6 to 4 Bya
-Planetary collision breaks off chunk of earth and it becomes the moon. (Giant Impact Hypothesis)
Lunar rocks have the same composition as earth.

5. Precambrian Time – 4.6 Bya-542 Mya
-Hadean Era 4.6 to 4 Bya
-Volcanic earth begins to cool and forms a crust.

6. -Hadean Era 4.6 to 4 Bya
-The Earth’s atmosphere forms from gases released from volcanoes(methane,CO2, ammonia)
-Water Vapor trapped in this atmosphere precipitated into oceans. (anaerobic prokaryote life began)

7. How did even more water get on our planet?
How did even more water get on our planet?

8. -Archean Era 4 to 2.5 Bya

9. -Archean Era 4 to 2.5 Bya Continental plates(land) are formed.
Diverse Microbial life flourished. (blue-green Cyanobacteria began to produce oxygen).

10. 2. Paleozoic Era-542 to 251 Mya
                   

11. 2. Paleozoic Era-542 to 251 Mya -Pangea forms.
- Oxygen-rich atmosphere.

12. 3. Mesozoic Era-251 Mya to 65.5 Mya
-Pangea begins to break apart.
Huge Meteor impacts the Earth.

13. Mass Extinction!!

14. 4. Cenozoic Era-65.5 Mya to present
-India collides with Asia, Antarctica drifts over the South Pole, and all continents moved to where we know them today.