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Chapter 20 Matter & Energy in the Environment

Chapter 20 Matter & Energy in the Environment. Abiotic Factors. What is an Ecosystem?. All organisms need both living and nonliving things to survive. Ecosystem – all living and nonliving things in an area. Forest Log Pond Biotic Factors – living things fish

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Chapter 20 Matter & Energy in the Environment

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  1. Chapter 20Matter & Energy in the Environment

  2. Abiotic Factors

  3. What is an Ecosystem? • All organisms need both living and nonliving things to survive. • Ecosystem – all living and nonliving things in an area. • Forest • Log • Pond • Biotic Factors – living things • fish • Abiotic Factors – nonliving things • water

  4. Nonliving Parts of an Ecosystem • Sun – provides energy, climate, and temperature • provides warmth and light • Climate – average weather conditions in an area over time. • influences where animals live • Temperature – how hot or cold an area is. • influences where animals live • Water – all life on Earth requires water. • growth & reproduction • Atmosphere – layer of gases surrounding Earth • provides oxygen and protection • Soil – rocks, water, air, minerals, and remains of once living things. • provides water & nutrients for plants • home for organisms

  5. Abiotic Factors

  6. Lesson 1 Review pg. 710 #’s 1 - 8

  7. Cycles of Matter

  8. Water Cycle Sun causes evaporation precipitation Water is never created or destroyed; only changed http://www.classzone.com/books/earth_science/terc/content/visualizations/es0105/es0105page01.cfm Back To Evapotranspiration transpiration - water is evaporated from plants. streams, rivers, ocean are bypassed Cools in Upper Atmosphere & Condenses Flows Into Falls to Earth Further Cooling

  9. NitrogenCycle • NitrogenCycle – biogeochemical cycle involving the element Nitrogen • Biogeochemical Cycle - chemical element or compound is changed as it moves through a cycle. drives the nitrogen compounds to the ground plant roots convert to useable compounds Return nitrogen compounds to the soil Soil take in and use nitrogen compounds from the soil Decay changes nitrogen gas to compounds are eaten by convert nitrogen compounds into nitrogen gas released into the air

  10. OxygenCycle release oxygen through photosynthesis take in oxygen from the air release carbon dioxide through cellular respiration take in carbon dioxide through photosynthesis

  11. Carbon Cycle • Carbon Cycle – biogeochemical cycle involving the element Carbon As they erupt release CO2 into the atmosphere Humans, animals, exhale CO2 into the atomosphere Burning fossil fuels release CO2 back into the atmosphere Dissolve CO2 while evaporating ATMOSPHERE Bacteria decompose dead organisms and respire CO2 Absorb CO2 As they burn release CO2 into the atmosphere Phytoplankton die/sink. Sea shells CaCO3 (lime) forms. Ocean and plants remove 40 % of CO2 in atmosphere

  12. Lesson 2 Review pg. 720 #’s 1 - 9

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