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(5 billion years ago) creation
The solar system was a swirling mass of gases and dust. This was made into the sun. The remaining planets formed by collisions of space debris. -
(4.6 billion years ago) Creation of earth
Earh began to form by colliding with space debris. This realeased thermal energy into the atmosphere. -
(4 billion years ago) Creating atmosphere
Volcanoes emitted gas, forming an atmosphere. Because of this happening organic molecules began to form. -
(3.5 billion years ago) Signs of life
Stromatolites, which are colonial organisms, began to form. -
(3 billion years ago) Photosynthetic life
Photosynthetic life forms. -
(2.2 billion years ago) Our earth
Earth fully develops to what it looks like today. -
(2 billion years ago) O2
O2 levels were at what they are today. -
(1.5 billion years ago) Eukaryotic
Endosymbiosis occured. Also the first eukaryotic organisms are formed. -
(1 billion years ago) Ozone
Ozone forms. It protected organisms from harmful UV reays so they could exist on land.
