Period 7 Secora Minnick history of earth timeline

Planets form (5 bya)

Jan 1, 2011

Forms from planets interstellular gast and dust

Earth began to form (4.6 bya)

Jan 26, 2011

Earth began to form

Bacteria diversy (3.8 bya)

Mar 21, 2011

Undistured volcano rock

Photosynthesizing bacteria (3.7 bya)

Apr 5, 2011

Microscopes produce energy

Oldest fossils (3.5 bya)

Apr 20, 2011

Land chunks collide to form earliest continents. Domed shape formations bacteria forming

Oldest eukaryote fossils (1.8)

Aug 22, 2011

Single celled algae growing bacteria forming

Major glaciation period begins (800 mya)

Nov 3, 2011

Ice age from orbit of earth and spin

Protective ozone layer in place (600 mya)

Nov 5, 2011

Ozone layer in place

Land plants (480 mya)

Nov 14, 2011

Green algae wash ashore adapt

Oxygen nears present day levels (400 mya)

Nov 20, 2011

Oxygen nears present day levels

Repitles (350 mya)

Nov 23, 2011

Reptiles with similar skeleton

End permain (250 mya)

Dec 1, 2011

90% of all species

Dinoasaurs mamals and crocodiles (220 mya)

Dec 3, 2011

Mamals, dinosaurs, and crocodiles

Pangaea starts to break apart (200 mya)

Dec 4, 2011

Deap heat causes rift valleys between continents

Tropical climate extends to plar regions (65 mya)

Dec 26, 2011

60-80% of all species go extinct

Primates (60 mya)

Dec 27, 2011

Primates evolved lemar to gorilla

Hominids (5.2 mya)

Dec 31, 2011

First known homins human like forms

Modern humans (100,00 years)

Dec 31, 2011

Modern humans despirse through africa