pop quiz from last class: answer questions on a separate sheet of paper! hand in 1.your house is an...
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POP QUIZ From Last class: POP QUIZ From Last class: Answer questions on a separate sheet of paper! Hand INAnswer questions on a separate sheet of paper! Hand IN
1. Your house is an example of a(n) ___.
a. biotic factor b. habitat c. niche
2. Trees, mosses and shrubs are all examples of what type of factor?
a. abiotic b. biotic c. commensalism
3. The study of interactions between organisms and their environments is called ?
a. botany b. cytology c. ecology
4. If you work at McDonald’s, that is an example of your?
a. habitat b. niche c. community
5. A group of deer that live in a forest is an example of a?
a. biosphere b. community c. population
HEADINGSHEADINGS
VOCABULARYVOCABULARY
IMPORTANT INFOIMPORTANT INFO
Ecosystem RecyclingEcosystem Recycling
ENERGY FLOWS THROUGH ECOSYSTEMWATER—NITROGEN—CARBON—PHOSPHORUSWATER—NITROGEN—CARBON—PHOSPHORUS
ARE RECYCLED!!!THEY MOVE THRU A BIOGEOCHEMICAL CYCLE: ABIOTIC (non-living) PORTION OF ENVIRONMENT
(ATMOSPHERE) LIVING THINGSTHEN BACK AGAIN
Water CycleWater Cycle
CELLS CONTAIN 70-9070-90% H20
VERY LITTLE OF EARTHS AVAILABLEAVAILABLE H20 IS IN LIVING THINGS
RIVERS / LAKES / STREAMS / OCEANS CONTAIN A BIG %
ATMOSPHERE CONTAIN WATER = WATER VAPORWATER VAPOR
GROUND WATER = IN SOIL OR UNDERGROUND IN POROUS ROCK
WATER CYCLE = MOVEMENT OF H20 B/T RESERVOIRS EVAPORATION TRANSPIRATION PRECIPITATION
EvaporationEvaporation
ADDS H20 VAPORVAPOR TO ATMOSPHERE
HEATHEAT CAUSES WATER TO EVAPORATE
90% 90% OF EVAPORATED WATER FROM TERRESTRIALTERRESTRIAL ECOSYSTEM PASSES THROUGH PLANTS IN A PROCESS CALLED…
TranspirationTranspiration
PLANTS TAKE IN H20 THRU ROOTSTHRU ROOTS
RELEASE WATER & TAKE IN CO2CO2 (CARBON DIOXIDE)
ANIMALS DRINK/EAT TO TAKE IN H20
ANIMALS RELEASE IT WHEN: BREATHING BREATHING SWEATING SWEATING EXCRETIONEXCRETION
PrecipitationPrecipitation
WATER LEAVES ATMOSPHERE
TEMP & AIR PRESSURE (ABIOTIC ABIOTIC FACTORSFACTORS) DETERMINE HOW MUCH WATER CAN BE HELD
ONCE ATM. IS SATURATED W/VAPOR = SNOW, RAIN, SLEET, SNOW, RAIN, SLEET,
HAIL OR FOGHAIL OR FOG
Carbon CycleCarbon Cycle
PHOTOSYNTHESIS + CELLULAR RESPIRATION
PHOTOSYNTHESIS = PLANTS & OTHER AUTOTROPHSAUTOTROPHS USE:
CO2CO2 + + H20 H20 & & SUNLIGHTSUNLIGHT = CARBOHYDRATES
CELLULAR CELLULAR RESPIRATIONRESPIRATION
PROCESS IN WHICH AUTOTROPHS & HETEROTROPHS USE OXYGEN (O2) TO BREAKDOWN CARBSBREAKDOWN CARBS..
CELLS MAKE ATPATP (ENERGY) BY BREAKING DOWN ORGANIC COMPOUNDS A COMPOUND THAT
RESULTS FROM LIVING THINGS & CONTAINS CARBONCARBON
HUMAN INFLUENCE ON THE CARBON CYCLEHUMAN INFLUENCE ON THE CARBON CYCLE
IN THE PAST 150 YEARS CO2 IN THE ATMOSPHERE HAS RISENRISEN 30%30% ALMOST ½ IN THE LAST 40 YEARS
DUE TO HUMANS ACTIVITY BURNING FOSSIL FUEL:
REMAINS OF ORGANISMS THAT HAVE BEEN TRANSFORMED BY DECAY, HEAT,DECAY, HEAT, & & PRESSUREPRESSURE ENERGY RICH
ORGANIC MOLECULES
BURNING RELEASES ENERGYENERGY & & CO2CO2
BURNING VEGETATION RELEASES CO2
TROPICAL RAINFOREST DESTRUCTION
WITH NO PLANTS CO2 IS NOTNOT ABSORBED
Nitrogen CycleNitrogen Cycle
NITROGEN IS NEEDED TO MAKE PROTEINS & NUCLEIC ACIDS:
ORGANIC MOLECULE, DNADNA OR RNARNA, THAT STORES & CARRIES IMPORTANT INFO FOR CELL FUNCTION
N2 (NITROGEN GAS) MAKES UP 78%78% OF THE ATMOSPHEREATMOSPHERE
N2 IS HOWEVERLIMITED TO AMMONIAAMMONIA FOR MOST LIVING THINGS
NITROGEN FIXATIONNITROGEN FIXATION
CONVERSION OF N2 TO AMMONIA CERTAIN BACTERIA CAN CONVERT NH3NH3
= NITROGEN-FIXING BACTERIA
LIVE IN SOILSOIL & IN SOME ROOTSROOTS
Recycling NitrogenRecycling Nitrogen
BODIES OF DEAD ORGANISMS CONTAIN “N” URINE & DUNG ALSO
DECOMPOSERS BREAK DOWN CORPSES & WASTE OF ORGANISMS GIVE OFF NITROGEN AS AMMONIA = AMMONIFICATION
NITRIFICATION = BACTERIA IN SOIL TAKE IN AMMONIA & OXIDIZE IT INTO NITRITESITES, NO2 & NITRATESATES, NO3 Back into the environment
DENITRIFICATIONDENITRIFICATION
RETURNING NITROGEN TO ATMOSPHEREATMOSPHERE
PLANTS CAN ABSORB NITRATES & AMMONIA FROM SOIL ANIMALS CANNOTNOT!
ANIMALS OBTAIN IT BY EATING OTHER ORGANISMS
THEY DIGESTDIGEST THE PROTEINSPROTEINS & NUCLEIC ACIDSNUCLEIC ACIDS
SUMMARY SUMMARY
1. WHAT IS THE BIOGEOCHEMICAL CYCLE
2. WHERE DO NITROGEN-FIXING BACTERIA LIVE? WHAT CRUCIAL FUNCTION DO THEY PERFORM?
3. DESCRIBE THE ROLE OF DECOMPOSERS IN NITROGEN CYCLE?
4. HOW HAS BURNING FOSSIL FUELS AFFECTED CARBON CYCLE?
5. THROUGH WHAT PROCESS DOES MOST H20 VAPOR ENTER ATM.
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