Chemistry atmosphere

• Clumps of rock are form together into molten rock
• In the beginning, outer planets are adher, more gas eg jer
• You do NOT need to know the history of the universe and how stars form
• You start with the formation of the planet for inner planets
• Earth was formed from dust and rock that was swirling around the sun soon after its formation
• Gravity pulled the dust and rock together into larger and larger lumps
• Because it was so close to the sun it did not gather any the gases unlike Jupiter and the outer planets
• Collisions between these rocks and the act of different forces pulling and pushing and this rocky material means our story starts with a hot molten spherical lump
• Super Earths

  x4 mass of our planets
• Water is present in large quantities as water vapour/steam
• There is NO molecular oxygen as it is too reactive to exist alone
• There was thought that mars planet size of bumped into a small type of earth, I for about a million years
• As the cooled the water vapour condensed and turned into clouds
• This water formed the oceans, it was topped up by the large number of icy comets that crashed into the Earth at that time
• The water dissolved all the soluble material in the rocks and so the seas became salty
• Large amounts of the carbon dioxide in the atmosphere dissolve into the water and some of this reacts to form carbonate rocks
• Within a billion years simple life has developed
• Bacterial and simple single celled plants and animals develop