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Elements(4.6 billion years ago)
Helium and hydrogen when combined together with dust make a nebula. -
Nebula (4.4 billion years ago )
Nebula is where plants and solar systems are able to form with the perfect condition. -
The Big Bang
the theory that the universe began with an explotion of a dense mass of matter and is still expanding from the force of the explotion. -
Earth's mutation form
When the big bang had exploded , diffrent temperatures and climate changed which led a mutation that foced earth to adapt. -
Earth/Solar system
earth revolves around the sun and the solar system. -
Earth's Solid form
Working groups that are proven that the Earth is solid is by showing tectonic plates shifting, coasts eroding, and volcanic eruptions. -
oxygen levels rise
-rise in the concentration of oxygen molecules stops the deposition of uraninites (since they are soluble when combined with oxygen) and starts the depoition of banded iron formations. -The last reserves of reduced iron are used up by the increasing atmospheric oxygen-last banded iron formations -
Cells
-eukaryotic cell organisms develop
-rise of multicellular organisms -
Dinosaurs
Cambrian expolsion of hard bodied organisms. -
Fossils
Fossils of ediacaran organsims are made -
Fossils
Fossilization of the burgress shale and fossilization of the chengjiang site. -
Mat animals evolved
k-t boundary--extinction of the dinosaurs. New animals start to form after the exctinction of dinosaurs such as primates and more like prosimians. -
Modern Humans Arouse
Common ancestor of all primates probably arose before the mass exctinction that closed the Cretadeous period 65 million years ago. -
Hominid
Species have been classified into two groups: Australopithecus and Homo. Australopithecus have been living for 3 to 4 million years ago.
