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earths atmosphere
- for 200million years, the atmosphere has been how it is now
- 78% nitrogen
- 21% oxygen
- small amount
other gases such
carbon dioxide,
water vapour and
noble gases
- 78% nitrogen
- phases of atmospheres evolution
- phase 1- vocanoes gave
out gas
- earths atmosphere was
orignally molten. too hot
for any atmosphere
- eventually it cooled
down and a thin crust
formed however
volcanoes continued to
erupt
- the volcanoes gave out a lot of
gases which formed the oceans
and atmosphere
- the earths atmosphere was most carbon
dioxide. with basically no oxygen and
small amounts of other gases such as water vapour.
- the ocean formed when the water
vapour dissolved
- earths atmosphere was
orignally molten. too hot
for any atmosphere
- phase 2- grean plants
evoved and and produced
oxygen
- green plants and algae evolved
over most of the earth in the
carbon dioxide atmospehere
- alot of the carbon dioxide dissolved into the oceans
and was replaced by oxygen through
photosynthesis
- plants and algae died and were burned under layers
of segement with the skeletons and shells of marine
organisms that had slowly evolved
- the carbon and hydrocarbons inside
them had become locked up in
sedimentary rocks as insoluble
carbonates and fossil fuels.
- carbon is released into the atmosphere when fossil fuels
are burnt, which rises the carbon dioxide concentration
in the atmosphere.
- carbon is released into the atmosphere when fossil fuels
are burnt, which rises the carbon dioxide concentration
in the atmosphere.
- the carbon and hydrocarbons inside
them had become locked up in
sedimentary rocks as insoluble
carbonates and fossil fuels.
- green plants and algae evolved
over most of the earth in the
carbon dioxide atmospehere
- phase 3- ozone layer allows
evolution of complex animals
- the build up of oxygen killed off
some organisms that couldn't
tolerate it. but allowed some
organisms to evolve and flourish
- the oxygen created the ozone layer,, which blocks harmful rays
from the sun and allowed some organisms to evolve
- there is virtually no carbon
dioxide left now
- the build up of oxygen killed off
some organisms that couldn't
tolerate it. but allowed some
organisms to evolve and flourish
- phase 1- vocanoes gave
out gas
- primordial soup
- states that billions of years ago, earth
atmosphere was rich in nitrogen, hydrogen,
ammonia and methane.
- lightening struck, causing a chemical reaction
between the gases, resulting in the formation
of amino acids
- the acid was collected in a prmordial soup
- a body of water where life gradually
crawled.
- a body of water where life gradually
crawled.
- the amino acids gradually combined to
produce organic matter, which eventually
evolved into simple living organisms
- reasearch shows that when gases are
sealed them heated and electrical charge
is applied for a week, amino acids are
made
- not enough amino acid is made to prove the theory completely right
- not enough amino acid is made to prove the theory completely right
- states that billions of years ago, earth
atmosphere was rich in nitrogen, hydrogen,
ammonia and methane.
- the earths atmosphere has all the
resources humans need.
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