WARM-UP 1.Using the chemical formulas written on slips of paper in the envelop at your desk, arrange...
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- WARM-UP 1.Using 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?
2.Now rearrange them into the correct formula for cellular
respiration. What happens to the carbon dioxide thats been
formed?
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- What happens to matter as organisms use nutrients?
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- Matter is cycled! Molecules are simply rearranged as they are
made & broken down.
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- Key Terms Biogeochemical cycling Water cycle Carbon cycle
Nitrogen cycle Phosphorus cycle Transpiration Assimilation
Eutrophication Nitrogen fixation Decomposition
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- CYCLE
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- Remember when we said species are interdependent? a.k.a.
Symbiosis Lion & the gazelle Strangler fig & the Oak Flower
& the bee Orchid & the tree
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- Biotic and Abiotic Factors Are Also Interdependent 1.Living
factors depend on non-living factors as a source of nutrients.
2.Non-living factors depend on living factors to cycle matter.
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- Organisms Cannot Exist Without Matter All 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.
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- Water Cycle Water exists in the environment as: Surface water
(ponds, lakes, oceans) Run-off Precipitation Vapor
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- Water Cycle Water enters the biotic world through the action
of: Absorption by plants (roots) Osmosis Drinking (no
slurping!)
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- Water Cycle Water returns to the environment from the biotic
world by: Evaporation Transpiration (plant stomata) Respiration
(all organisms!)
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- Carbon Cycle Carbon exists in the environment as: carbon
dioxide (CO 2 ) in the atmosphere and water deposits of coal,
petroleum, and natural gas derived from once-living things dead
organic matter
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- Carbon Cycle Carbon 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)
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- Carbon Cycle Carbon returns to the atmosphere and water from
the biotic world by: Respiration (producing CO 2 ) Burning
(producing CO) Decomposition (producing CO 2 if oxygen is present,
methane (CH 4 ) if it is not)
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- Nitrogen Cycle Nitrogen exists in the environment as: Nitrogen
gas (N 2 ) in air Nitrates (fertilizers) Ammonia
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- Nitrogen Cycle Nitrogen enters the biotic world through the
action of: Nitrogen fixation (bacteria convert N 2 to a fixed form)
Eutrophication (too much fertilizer washes with runoff)
Assimilation
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- Nitrogen Cycle Nitrogen returns to the atmosphere or
environment by: Decomposition (bacteria, fungi) Denitrification
(bacteria) Ammonification (all organisms excrete waste)
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- Phosphorus Cycle Phosphorus exists in the environment as: A
phosphate ion (PO 4 - ) Salts & rock sediments
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- Phosphorus Cycle Phosphorus enters the biotic world through the
action of: Absorption (plants) Heterotrophy (food chain)
Assimilation
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- Phosphorus Cycle Phosphorus returns to the atmosphere or
environment from the biotic world by: Decomposition (bacteria,
fungi)
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- T.O.T.D. 1.How is water used by organisms? Whats it used for?
2.How is carbon used by organisms? Whats it used for? 3.How is
nitrogen used by organisms? Whats it used for? 4.How is phosphorus
used by organisms? Whats it used for?