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Ecology day 3

Ecology day 3. Turn in the ecosystems wkst from yesterday. Use of Resources. Natural resource - part of natural environment EX: soil, water, crops, oil, gas, wildlife. A. Compare types of resources. Renewable - replaced or recycled by natural processes (Biodegradable)

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Ecology day 3

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  1. Ecology day 3 Turn in the ecosystems wkst from yesterday

  2. Use of Resources • Natural resource - part of natural environment • EX: soil, water, crops, oil, gas, wildlife A. Compare types of resources • Renewable - replaced or recycled by natural processes (Biodegradable) • EX: plants, animals, crops, soil • Nonrenewable - available in limited amounts • EX: fossil fuels, metals

  3. C. Identify major sources of air, water, and land pollution • 1. Pollution - contamination of any part of environment 3. Acid rain a. Water mixes with carbon dioxide to form carbonic acid b. Damages plants, affects fish, contaminates water c. More in cities and industrialized areas • 2. Air pollution • a. Caused most by burning fossil fuels • b. Particulates - solid soot particles, form smog

  4. Figure 6-12 The Formation of Acid Rain Section 6-2 Chemical Transformation Nitric acid Sulfuric acid Condensation Emissions to Atmosphere Nitrogen oxides Sulfur dioxide Dry Fallout Precipitation Acid rain, fog, snow, and mist particulates, gases Industry Transportation Ore smelting Power generation Go to Section:

  5. 4. Ozone depletion a. Ozone layer - high in stratosphere; protects Earth from U.V. b. Depletion allows lethal doses of UV rays to reach earth c. Caused by CFC’s(chlorofluorocarbons), styrofoam products, some aerosol sprays

  6. 5. Greenhouse effect a. Natural process that traps heat in atmosphere b. Atmospheric gases (CO2) prevent heat from escaping into space c. Process where heat is retained by gases in the environment d. Thought to be caused by combination of different pollutants( car exhaust, etc) Sunlight Some heat escapes into space Greenhouse gases trap some heat Atmosphere Earth’s surface

  7. 6. Water pollution • a. Sewage, industrial wastes, fertilizer runoff • b. Contaminates groundwater (soil doesn't filter out contaminants) 7. Land pollution a. Trash is burned or buried instead of being recycled b. Biodegradable - wastes broken down naturally c. Nonbiodegradable - stay in environment for 100's to 1000's of years

  8. Evaporation Transpiration Fig 3-11 The Water Cycle Section 3-3 All living things require water to survive. Where does it all come from? Condensation Precipitation Runoff Seepage It moves between the ocean, atmosphere, and land. Root Uptake This figure shows how water molecules can change forms and be used through evaporation (change from liquid to gas) and transpiration (by evaporating from the leaves of plants). Go to Section:

  9. Figure 3-13 The Carbon Cycle Section 3-3 CO2 in Atmosphere Carbon is especially important to living systems because it is the key ingredient in all living organisms. Carbon is found in the oceans, in the air, and in certain types of rocks. CO2 in Ocean This figure shows how these processes move carbon through the biosphere. Go to Section:

  10. Figure 3-14 The Nitrogen Cycle Section 3-3 N2 in Atmosphere All organisms re- quire nitrogen to make amino acids, which in turn, are used to build proteins. NO3- and NO2- NH3 NITROGEN CYCLE: 1. All animals need nitrogen to make amino acids 2. Nitrogen fixation: bacteria convert gaseous nitrogen to ammonia 3. Denitrification: soil bacteria converts nitrates into nitrogen gas Go to Section:

  11. Finish recycle city at home and bring it back complete next class.

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