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148
Biogeochemical Cycles
Bio Geo
Life
Earth
Chemical
A substance having
a specific molecular
composition- used in
chemical processes.
Cycles
a series of events
that are regularly
repeated in the
same order.
Processes in which Important Chemicals
Needed for Life are Unlocked for Organisms to Use.
Where is this
water going?
Is this where the
water is going to
“end up”?
Important
life
chemicals
for
Biosphere
locked
up
organisms
Condensation
Precipitation
Transpiration
Run off
Infiltration
Evaporation
Accumulation
Ground water
9) Does this Cycle have a beginning and an end to it?
No. The events keep repeating.
10) What two things provide the Energy in this Cycle?
1. The Sun
2. Gravity
11) What type of Organisms are a major part of the
Hydrologic Cycle?
during Transpiration
Plants
Combustion
Respiration
Photosynthesis
Respiration
Photosynthesis
Respiration
Nitrogen Cycle
Nitrogen Fixation• The process by which free Nitrogen (N2) is taken from the
atmosphere and converted (fixed) into Nitrogen compounds
which are plant nutrients (fertilizer).
• In nature, this process is carried out by certain bacteria
present in the root nodules of legumes such as beans and peas,
blue-green algae, and lightning flashes.
Read more:
http://www.businessdictionary.com/definition/nitr
ogen-fixation.html
Protein
Protein
% of gases making up air
N2
O2
N2 :Free Nitrogen
Air
Fixed Nitrogen: Protein
Amino acid
corn
1. (F) Free Nitrogen
…...in Atmosphere
5. (G) Organism use
plant proteins
2. (H) Lightening
Fixes Nitrogen
4. (B) Plant absorbs Ammonia
and other Nitrogen containing
molecules and uses these
substances to make Proteins
6. (E) Organism
Dies
7. (D) Bacteria change
proteins and wastes
into ammonia
3. (C) Nitrogen fixing
bacteria fix Nitrogen
8. (A) Some bacteria
change ammonia
into nitrogen gas
Processes by which important chemicals needed for Life are
unlocked for organisms to use.
Carbon/oxygen Cycle
Nitrogen Cycle
Hydrologic cycle
Nitrogen Cycle
Hydrologic Cycle
created
destroyed
changed
The End
Biogeochemical Cycles
.
Bio Geo
Chemical
..
. A substance having
Cycles
a
of events
a specific
. that are regularly
composition- used in repeated in the
chemical
. .
.order.
Processes in which Important
Needed for Life are Un
for Organisms to
.
Nitrogen Cycle
Nitrogen Fixation• The process by which
atmosphere and
which are plant
Nitrogen (N2) is taken from the
(fixed) into Nitrogen compounds
(fertilizer).
• In nature, this process is carried out by certain
present in the root nodules of legumes such as beans and
blue-green algae, and
flashes.
.
Read more:
http://www.businessdictionary.com/definition/nitr
ogen-fixation.html
,