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chemistry of the atmosphere
composition & evolution of the Earths atmosphere
Earth's early atmosphere
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Created by
shannon rose
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Cards (7)
why is evidence for the early atmosphere limited?
it was
4.6
billion
years ago
how was Earth's early atmosphere formed?
volcanic activity
released
gases
:
carbon dioxide
,
nitrogen
,
water vapour
,
methane
,
ammonia
early atmosphere was made up of mostly
carbon dioxide
what happened when oceans formed & how?
Earth
cooled
&
water vapour
in the atmosphere
condensed
carbon dioxide
dissolved
in the oceans
the dissolved
carbon dioxide
went through a series of
reactions
to form carbonate precipitates that formed
sediments
on the sea bed
how did oxygen increase?
plants
&
algae
evolved
they absorbed carbon dioxide & released
oxygen
bc of
photosynthesis
equation for photosynthesis
carbon dioxide
+
water
->
glucose
+
oxygen
how did carbon dioxide decrease?
algae
&
plants
absorbed
carbon dioxide
by
photosynthesis
formation of
sedementary rocks
trapped
carbon dioxide
dissolved
in
oceans
describe how deposits of limestone, coal, crude oil & natural gas were formed
plankton
died
organisms were covered by
sediments
subjected to
high
temperature
&
pressure