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WARM-UP

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 that’s been formed? Now rearrange them into the correct formula for cellular respiration.

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WARM-UP

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  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 that’s been formed? Now rearrange them into the correct formula for cellular respiration. What happens to the carbon dioxide that’s been formed? WARM-UP

  2. What happens to matter as organisms use nutrients?

  3. Matter is cycled! Molecules are simply rearranged as they are made & broken down.

  4. Key Terms Biogeochemical cycling Water cycle Carbon cycle Nitrogen cycle Phosphorus cycle Transpiration Assimilation Eutrophication Nitrogen fixation Decomposition

  5. CYCLE

  6. Remember when we said species are interdependent? a.k.a. Symbiosis Lion & the gazelle Strangler fig & the Oak Flower & the bee Orchid & the tree

  7. Biotic and Abiotic Factors Are Also Interdependent • Living factors depend on non-living factors as a source of nutrients. • Non-living factors depend on living factors to cycle matter.

  8. 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.

  9. Water Cycle Water exists in the environment as: • Surface water (ponds, lakes, oceans) • Run-off • Precipitation • Vapor

  10. Water Cycle Water enters the biotic world through the action of: • Absorption by plants (roots) • Osmosis • Drinking (no slurping!)

  11. Water Cycle Water returns to the environment from the biotic world by: • Evaporation • Transpiration (plant stomata) • Respiration (all organisms!)

  12. Carbon Cycle Carbon exists in the environment as: • carbon dioxide (CO2) in the atmosphere and water • deposits of coal, petroleum, and natural gas derived from once-living things • dead organic matter

  13. 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)

  14. Carbon Cycle Carbon 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)

  15. Nitrogen Cycle Nitrogen exists in the environment as: • Nitrogen gas (N2) in air • Nitrates (fertilizers) • Ammonia

  16. Nitrogen Cycle Nitrogen enters the biotic world through the action of: • Nitrogen fixation (bacteria convert N2 to a “fixed” form) • Eutrophication (too much fertilizer washes with runoff) • Assimilation

  17. Nitrogen Cycle Nitrogen returns to the atmosphere or environment by: • Decomposition (bacteria, fungi) • Denitrification (bacteria) • Ammonification (all organisms excrete waste)

  18. Phosphorus Cycle Phosphorus exists in the environment as: • A phosphate ion (PO4-) • Salts & rock sediments

  19. Phosphorus Cycle Phosphorus enters the biotic world through the action of: • Absorption (plants) • Heterotrophy (food chain) • Assimilation

  20. Phosphorus Cycle Phosphorus returns to the atmosphere or environment from the biotic world by: • Decomposition (bacteria, fungi)

  21. T.O.T.D. • How is water used by organisms? What’s it used for? • How is carbon used by organisms? What’s it used for? • How is nitrogen used by organisms? What’s it used for? • How is phosphorus used by organisms? What’s it used for?

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