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Components of Earth

Components of Earth. Biotic and Abiotic Factors. Spaceship Earth. Closed System Resources are limited. Why is earth so favorable for life?. Distance from the sun (Temp range) Size of the planet (Gravity). What sustains life on earth?. Earth’s 4 spheres help support organisms Atmosphere

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Components of Earth

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  1. Components of Earth

  2. Biotic and Abiotic Factors

  3. Spaceship Earth • Closed System • Resources are limited

  4. Why is earth so favorable for life? • Distance from the sun (Temp range) • Size of the planet (Gravity)

  5. What sustains life on earth? • Earth’s 4 spheres help support organisms • Atmosphere • Hydrosphere • Geosphere • Biosphere

  6. Atmosphere Hydrosphere Geosphere Biosphere

  7. Biosphere • Abiotic and Biotic Factors • Uppermost part of the geosphere, most of the hydrosphere, and lower part of the atmosphere

  8. Why it matters….. • Humans are apart of a community of organisms • Humans are dependent on healthy ecosystems • Humans can disrupt ecosystems harming the organisms and themselves

  9. Ecosystems (Sun) • One – way flow of high – quality from the sun • Energy is lost as heat through process • Warms atmosphere • Evaporates and recycles water • Generates winds • Supports plant growth

  10. What is an ecosystem? • An ecosystem includes a community of organisms and their physical environment. • Web of relationships • Predator/prey • Symbiotic • Competition • Biotic and Abiotic factors

  11. Habitat • Food, shelter, water, space • Biodiversity • Variety of organisms in a given area • Abiotic factors • When biodiversity decreases in an ecosystem, health of the ecosystem decreases.

  12. Impact Populations • Limiting factors • Resources • Law of tolerance • too much or too little of abiotic factor • Nutrients, precipitation, temperature

  13. Biological Components • Producers (Autotroph) • Make their own food • Consumers (Heterotroph) • Feed on other organisms • Omnivores • Carnivores • Herbivores • Detritivores

  14. Food ChainVSFood Web

  15. Food Chain VS Food Web • Food Chain • Producer to herbivore to carnivore • Omnivore • Food Web • Interconnected food chains • Complicated • Loss of energy/10% Rule

  16. Energy Flow in Ecosystems • Trophic levels • Each step in the transfer of energy in an ecosystem • Primary source, Sun • Producer • Consumer • Decomposer

  17. Feeding levels • Trophic levels • Producers are the lowest level • Primary consumers • Secondary consumer • Tertiary consumer and so on • 10% rule, 90% energy lost as heat, growth, reproduction

  18. Energy Pyramid • Demonstrates the amount of energy transferred to each level • 10% Rule

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