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early vs current atmosphere (current atmosphee (how humans are changing…
early vs current atmosphere
ertly atmosphere 4.5 billion years ago
lots of volcanos
relive a lot of carbondioxide
lots of water vapour (steam)
as the erth cooled the water vapour condenced in to the ociens
98% carbon dioxid
2% ammonia and methane
current atmosphee
78% nitrogen
21% Oxegen
much less than 1% carbondioxide
how humans are changing the atmosphere
releasing carbon dioxide back in to the atmosphere by burning fossil fuels this is leading to climate change
why and how it cahnged
at some point plants evolved as algie in the sea
the algie carried out photosynthesis
converting carbon dioxide in to oxegen
the carbon trapped by plants over time formed fossil fuels such as coal
carbon dioxide dissolved in the sea
carbon dioxide forms shells of sea creatures
witch forms lime stone when they die
the nitrogen came from the ammonia produced by the volcanos