Formation of Earth

The Moon

Continents Form

Prokaryotes  First signs of life  Bacteria – single cell

Rise in Oxygen  Why was this important? What was able to form now that we had oxygen?  More complex life!

Eukaryotes  More complex than prokaryotes, still very small

Jellyfish

Jawed Fish

Land Plants

Amphibians

First Sharks  Sharks have changed very little

First Insects  Much bigger than today

Mass extinction  86% of everything died out  Not sure what happened  Some theories include: volcanoes and impacts

Dinosaurs  Ruled for 175 million years

Mammals  Very small, why?

Extinction of the Dinosaurs  Why did they go extinct?  What did this mean for mammals?

Eohippus  Larger mammals take over

Apes

Homo Sapiens  Only 100,000 years