Environment Final Review

Environment Final Review - ENVT 0845 Section 018 Final Exam...

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ENVT 0845 Section 018 Final Exam Study Guide General Concepts to be familiar with: What is a hypothesis? Hypothesis: An explanation set forth in a manner that can be tested and is Capable of being disproved. Independent vs. dependent variable Dependent variable: A variable affected by the manipulation of one or more other variables. Independent variable: The variable that is manipulated by the investigator; affects the dependent variable. Sustainability The ability to meet the needs of the present without compromising the ability of future generations to meet their own needs Population: effects on the environment, world population trends, Environmental Impact: we consume resources such as land, food, water, soils, and services from healthy ecosystems we emit wastes as a product of our consumption activities, including air and water pollutants, toxic materials, greenhouse gases, and excess nutrients depends on both the number of people and how they live Global Population Increase: Developing countries - low per capita incomes y Increased Fertility Rates y Increases Birth Rates y Increased Infant/Child Mortality Rates y Decreased Birth Control Methods
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Increase Dependence on Agriculture y Increased Environmental Degradation Soil Degradation Non-Sustainability Richest 1/5 of the world’s people use 86% of the world’s resources Demographic transition - what is it Demographic Transition – leads to stabilization of pop. growth Biogeochemical cycles – most important ones Biogeochemical Cycles- chemicals cycle through both the biological and the geological world
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Water Cycle: 97% of water is in oceans 2% in ice caps and glaciers 1% in lakes, rivers, groundwater and vapor. (diagram on PowerPoint 4 PopBioGeo) Carbon Cycle: Essential for life Producers capture carbon (CO2) and use in photosynthesis Photosynthesis follows the reaction 6CO 2 + 6H 2 O → C 6 H 12 O 6 + 6O 2 Producers from millions of years ago captured carbon – fossil fuels Combustion of fossil fuels and clearing of forests release carbon (diagram on PowerPoint 4 PopBioGeo) Nitrogen Cycle: Human activities, including fossil fuel combustion, cultivation of nitrogen- fixing crops, and rising use of nitrogen fertilizer, are altering the natural
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This note was uploaded on 09/20/2011 for the course MYTH 2001 taught by Professor Online during the Spring '11 term at Temple.

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Environment Final Review - ENVT 0845 Section 018 Final Exam...

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