Transcript Slide 1

http://www.animationlibrary.com/search/?keywords=recycle
BIOGEOCHEMICAL
CYCLES
http://mff.dsisd.net/Environment/Cycles.htm
ENERGY & MATTER
Energy is not the only thing
that moves through the ecosystem.
Atoms are never destroyed . . . only
transformed.
Take a deep breath.
The atoms you just
inhaled may have been
inhaled by a dinosaur
millions of years ago.
http://educ.queensu.ca/~fmc/august2004/pages/dinobreath.html
4 ATOMS make up 95% of the
body in most organisms
CARBON
OXYGEN
HYDROGEN
NITROGEN
The same molecules are passed around
again and again within the biosphere in
BIOGEOCHEMICAL CYCLES
___________________________
WATER CYCLE
HYDROLOGIC CYCLE
= ___________________
http://www.urbanrivers.org/water_cycle.html
WHY IS WATER IMPORTANT?
Makes up 60-70% of your body
Oxygen and Hydrogen are found in all the
building blocks of cells
________________________:
carbohydrates, proteins,
nucleic acids, lipids
Hydrogen in H2O supplies
protons (H+) & electrons
for_______________
photosynthesis
http://www.lsbu.ac.uk/water/molecule.htm
WHY IS WATER IMPORTANT?
SOLVENT
Water is a good _________________
Many molecules dissolve in water so it
provides a place for chemical reactions
to happen
Water doesn’t change temperature easily
http://www.lsbu.ac.uk/water/molecule.htm
WATER CYCLE
evaporation
condensation
http://www.radio-canada.ca/jeunesse/fd6/000_images/cat/c_buee_c.gif
http://www.css.cornell.edu/faculty/hmv1/watrshed/Etrans.htm
The evaporation of water from the
surface of plant leaves
TRANSPIRATION
= ________________
The return of water to
the surface in the form of
rain, snow, sleet, hail, etc.
= ____________________
PRECIPITATION
Image edited from: http://www.cotf.edu/ete/modules/msese/earthsysflr/water.html
WATER CYCLE
PH ONLINE LINK
Put in code: cbp-2033 Choose Start
CARBON CYCLE
CO2 in
atmosphere
CO2 in
ocean
BIOLOGY; Miller and Levine; Prentice Hall; 2006
4 main CARBON reservoirs
in BIOSPHERE
1.In ____________
atmosphere
as CO2 gas
ocean
2.In _______
as dissolved CO2 gas
3.On _______
in organisms, rocks, soil
land
Underground as coal & petroleum (fossil
4.__________
fuels) and calcium carbonate in rocks
CO2 in
atmosphere
CO2 in
Ocean
BIOLOGY; Miller and Levine; Prentice Hall; 2006
Where does CO2 in atmosphere come from?
CO2 in
atmosphere
CO2 in
Ocean
Volcanic activity
1.________________
Human activity (burning fossil fuels)
2.______________
3._________________
Cellular respiration
Decomposition of dead organisms
4.____________
BIOLOGY; Miller and Levine; Prentice Hall; 2006
WHY IS CARBON IMPORTANT?
BUILDING BLOCKS of cells:
Found in all the _______________
carbohydrates, proteins,
nucleic acids, lipids
Image by Riedell
http://web.jjay.cuny.edu/~acarpi/NSC/12-dna.htm
WHY IS CARBON IMPORTANT?
Carbon in CO2 provides the atoms for
GLUCOSE production during
__________
PHOTOSYNTHESIS
__________________...
the fuel that all living things depend on.
http://www.science.siu.edu/plant-biology/PLB117/JPEGs%20CD/0076.JPG
http://www.biologyclass.net/mitochondria.jpg
NITROGEN CYCLE
Section 3-3
N2 in Atmosphere
NO3and NO2-
NH3
BIOLOGY; Miller and Levine; Prentice Hall; 2006
WHY IS NITROGEN
IMPORTANT?
NITROGEN BASES make DNA and RNA
Used in ATP= Energy for the cell
Makes AMINO part of amino acids (proteins)
Image by Riedell
http://web.jjay.cuny.edu/~acarpi/NSC/12-dna.htm
Image by Riedell
79% of the atmosphere is made
up of NITROGEN gas (N2)
CAN’T use the nitrogen gas
BUT we _____
we breathe!
The bond in N2 gas is so
strong it can only be broken by
lightning
_______________
Volcanic activity
_______________
few special bacteria
____________________
Image by Riedell
http://web.jjay.cuny.edu/~acarpi/NSC/12-dna.htm
Image by Riedell
in the soil
Bacteria that live ______________
symbiotic
and in _________
relationships with
legumes
plants called _________,
take
nitrogen from the atmosphere and
AMMONIA (NH3) a form
turn it into ______________,
that is usable by plants.
THIS PROCESS
IS CALLED
_________________
NITROGEN FIXATION
http://www.slic2.wsu.edu:82/hurlbert/micro101/images/101nodules21.gif
Other bacteria in the soil convert
NITRATES (NO3- )
ammonia into ________________
& NITRITES (NO2-)
& _________________
which plants can also use.
The nitrogen we need for proteins,
ATP, and nucleic acids comes from
the FOOD
___________
WE EAT
not the
AIR we breath!
___________
Image from: http://www.utdallas.edu/images/departments/biology/misc/gonzalez-image.jpg
and http://www.cibike.org/CartoonEating.gif
modified by Riedell
NITROGEN CYCLE
Section 3-3
N2 in Atmosphere
NO3and NO2-
NH3
BIOLOGY; Miller and Levine; Prentice Hall; 2006
in the soil
Bacteria that live ______________
also carry out the reverse process
NITRATES
NITROGEN GAS
& NITRITES
___________
→ _____________
.
THIS PROCESS
IS CALLED
DENITRIFICATION
_________________