Post on 16-Dec-2015
NITROGENCYCLE
http://www.animationlibrary.com/search/?keywords=recycle
ENERGY & MATTEREnergy is not the only thingthat moves through the ecosystem.
Atoms are never destroyed . . . only transformed.
http://mff.dsisd.net/Environment/Cycles.htm
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
6 ATOMS make up 95% of the body in most organisms
CARBON
HYDROGEN
OXYGEN
NITROGEN
The same molecules are passed around again and again within the biosphere in____________________ cyclesBIOGEOCHEMICAL
PHOSPHORUS
SULFUR
N2 in Atmosphere
ammonia
Nitrates& nitrites
Section 3-3
NITROGEN CYCLE
BIOLOGY; Miller and Levine; Prentice Hall; 2006
WHY IS NITROGEN IMPORTANT?
Image by Riedell
__________________make DNA and RNA
Adenine (nitrogen base) is used in _______
Makes AMINO part of ____________
(proteins)
Image by Riedell
http://web.jjay.cuny.edu/~acarpi/NSC/12-dna.htm
NITROGEN BASES
ATP
amino acids
79% of the atmosphere is made up of NITROGEN gas (N2)
Image by Riedell Image by Riedell
http://web.jjay.cuny.edu/~acarpi/NSC/12-dna.htm
BUT we _____ use the nitrogen gas we breathe!
The bond in N2 gas is sostrong it can only be broken by__________________________________________________
CAN’T
lightningVolcanic activityfew special bacteria
http://www.slic2.wsu.edu:82/hurlbert/micro101/images/101nodules21.gif
Bacteria that live ______________and in _________ relationships withplants called _________, take nitrogen from the atmosphere and turn it into ______________, a form that is usable by plants.
THIS PROCESSIS CALLED_________________
in the soil
symbiotic
legumes
AMMONIA
NITROGEN FIXATION
Image from: http://www.utdallas.edu/images/departments/biology/misc/gonzalez-image.jpg and http://www.cibike.org/CartoonEating.gif modified by Riedell
Other bacteria in the soil convertammonia into ____________& _______________which plants can also use. The nitrogen we need for proteins, ATP, and nucleic acids comes from
the _____ we eat ____ the____ we breathe!
NITRATES
FOOD
NOT AIR
NITRITES
Bacteria that live ______________also carry out the reverse process
________________ → ___________________.
THIS PROCESSIS CALLED_________________
in the soil
NITRATES & NITRITES
NITROGEN GAS
DENITRIFICATION
REVIEW => NITROGEN CYCLE
Why can’t we use the N in the atmosphere?
In what forms do plants absorb Nitrogen?
Name the processes by which N gas is converted into usable forms of nitrogen.
Why is nitrogen important to living organisms?
What is it and how does it work?
The Water Cycle
The Water Cycle
Condensation
Water Vapor
Precipitation
Evaporation
Transpiration
Water CycleWater never leaves the
Earth. It is constantly being cycled through the atmosphere, ocean, and land. This process, known as the water cycle is driven by energy from the sun. The water cycle is crucial to the existence of life on our planet.
WaterThe water cycle begins
with water. Water is found in many places. A few of them are as follows:
Lakes, rivers, oceans, ponds, puddles, reservoirs, and many other places.
EvaporationThe next stage is
evaporation. This is a process where the water is heated and turned into a water vapor.
The sun is the main heat source for this process.
Condensation The next stage is
condensation. This is where warm and cold air collide and form ice crystals that condense and form droplets of water. These water droplets eventually become to heavy and begin to fall in the form of precipitation.
Precipitation The next stage is
Precipitation. This is water falling to the earth in the form of snow, hail, rain, or sleet.
CollectionDuring collection
water that falls as precipitation essentially collects as surface water (water you can see above ground) or as ground water (water that collects beneath earth’s surface).
TranspirationThe process of
evaporation from plants is called transpiration. (In other words, it’s like plants sweating.)
Evaporation
Evaporation
Condensation
Condensation
Condensation
Precipitation
Collection/Percolation
Collected Water
Collection/Percolation
Surface Water
Review => Water Cycle
Which 2 processes put water into the atmosphere?
How does water return to the earth? In what forms?
Where are some of the places that water collects on/in the earth?
What is transpiration?
Where does transpiration occur?