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Slide 1

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Nutrient cycle
Carbon cycle
Nitrogen cycle
Global warming
fetilisers…read more

Slide 2

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Carbon cycle
1. Nutrient is taken up by producer as inorganic molecule.
2. Producer incorporates nutrients into organic
3. Producer is eaten by consumers-passing nutrient on.
4. Nutrients passed along food chain as consumers are
5. When consumer/producer dies, their complex
molecules are broken down by SAPROBIOTIC
6. The saprobiotic microorganisms secrete enzymes
which breakdown the complex molecules into smaller
molecules they can absorb by diffusion
7. The saprobiotic microorganisms respire and release
the carbon in its original state.…read more

Slide 3

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The Earth has a finite amount of
Living things are made up of carbon
(often they are described as being
carbon-based) and need carbon to
Carbon is also found in non-living
things such as rocks, animal shells,
the atmosphereand oceans.
Carbon found in something living is
called organic carbon.
Carbon found in something non-living is
called inorganic carbon.
Carbon dioxideCarbon dioxide is an
important gas in our atmosphere. It
prevents heat from escaping and, in
doing so, warms up the Earth's
atmosphere. In a similar way to the
glass of a greenhouse, it traps the heat
from escaping and, for this reason, it is
called agreenhouse gas.…read more

Slide 4

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Photosynthesis? Respiration? And
the atmosphere.
Co2 in the atmosphere is the main source of
Carbon yet only makes up 0.04%.
Photosynthesis and respiration is very important.
There is short term fluctuations to oxygen and
co2- variations in rates of photosynthesis and
Co2- greater in the night as there is no light at
night and no photosynthesis
Daytime amount of co2 in the air is lower on a
summers day than on a winters day due to
higher rate of photosynthesis.…read more

Slide 5

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Human activity??
Human activity greatly affects levels of co2
in the atmosphere:
1. Combustion of fossil fuels
2. Deforestation- removes the amount of
photosynthesising biomass
Upset balance of carbon cycle.…read more

Slide 6

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If decay is prevented then
the organisms may become
fossilised-over millions of
years form carbon
containing sedimentary-
chalk limestone
Excess co2 in the
atmosphere dissolves in the
water, these stores help
keep the co2 concentration
in the atmosphere constant.
When atmospheric levels
are low these reserves
Under water organisms use
this dissolved co2 to form
macromolecules which
make up their bodies.…read more

Slide 7

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Slide 9

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Slide 10

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Wish some of the diagrams were easier to see but pretty good source!

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