evolution of the atmosphere - where did CO2 go Flashcards
1
Q
what organisms created coal
A
trees located by swamps and estuaries
2
Q
why is it important trees fell into water
A
there is no oxygen which means the tree doesn’t decay
3
Q
what formed coal
A
high amounts of pressure compressed into coal
4
Q
what are oil and gases made from
A
hydrocarbons
5
Q
how were oils and gases made
A
organisms died in oceans and didn’t decay, they were compressed and reacted to form oil and gas
6
Q
when it rained what happened
A
CO2 (soluble) dissolved into the rain and created carbonate ions
7
Q
what happened to carbonate ions
A
they reacted to form sedimentary rocks and shells and skeletons
