WARM-UP

WARM-UPUsing the chemical formulas written on slips of paper in the envelop at your desk, arrange them into the correct formula for photosynthesis. What happens to the glucose thats been formed?Now rearrange them into the correct formula for cellular respiration. What happens to the carbon dioxide thats been formed?What happens to matter as organisms use nutrients?

Matter is cycled! Molecules are simply rearranged as they are made & broken down.Key TermsBiogeochemical cyclingWater cycleCarbon cycleNitrogen cyclePhosphorus cycle

TranspirationAssimilationEutrophicationNitrogen fixationDecomposition

CYCLE

Remember when we said species are interdependent?a.k.a. SymbiosisLion & the gazelleStrangler fig & the OakFlower & the beeOrchid & the treeBiotic and Abiotic Factors Are Also InterdependentLiving factors depend on non-living factors as a source of nutrients. Non-living factors depend on living factors to cycle matter.Organisms Cannot Exist Without MatterAll living things are made of the same matter as non-living things (carbon, hydrogen, nitrogen, phosphorus, oxygen).Organisms use matter to assemble & break down essential nutrients for life.

Water CycleWater exists in the environment as:Surface water (ponds, lakes, oceans)Run-offPrecipitationVaporWater CycleWater enters the biotic world through the action of:Absorption by plants (roots)Osmosis Drinking (no slurping!)

Water CycleWater returns to the environment from the biotic world by:EvaporationTranspiration (plant stomata)Respiration (all organisms!)

Carbon CycleCarbon exists in the environment as: carbon dioxide (CO2) in the atmosphere and waterdeposits of coal, petroleum, and natural gas derived from once-living things dead organic matter

Carbon CycleCarbon enters the biotic world through the action of:Photosynthesis (plants, plant-like)Chemosynthesis (bacteria)Heterotrophy (food chain)Assimilation (organisms take in nutrient for building their tissues)Carbon CycleCarbon returns to the atmosphere and water from the biotic world by:Respiration (producing CO2)Burning (producing CO)Decomposition (producing CO2 if oxygen is present, methane (CH4) if it is not)

Nitrogen CycleNitrogen exists in the environment as:Nitrogen gas (N2) in airNitrates (fertilizers) AmmoniaNitrogen CycleNitrogen enters the biotic world through the action of:Nitrogen fixation (bacteria convert N2 to a fixed form)Eutrophication (too much fertilizer washes with runoff)AssimilationNitrogen CycleNitrogen returns to the atmosphere or environment by:Decomposition (bacteria, fungi)Denitrification (bacteria) Ammonification (all organisms excrete waste)

Phosphorus CyclePhosphorus exists in the environment as:A phosphate ion (PO4-)Salts & rock sediments

Phosphorus CyclePhosphorus enters the biotic world through the action of:Absorption (plants) Heterotrophy (food chain) Assimilation Phosphorus CyclePhosphorus returns to the atmosphere or environment from the biotic world by:Decomposition (bacteria, fungi)

T.O.T.D.How is water used by organisms? Whats it used for?How is carbon used by organisms? Whats it used for?How is nitrogen used by organisms? Whats it used for?How is phosphorus used by organisms? Whats it used for?