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Date Created: 11/12/15
Environmental Science Worksheet 1 SCI256 Version 4 University of Phoenix Material Environmental Science Worksheet Answer the following questions in at least 100 words The answers are found in Ch 1 4 of Environmental Science 1 What would you include in a brief summary on the history of the environmental movement Before 1960 only a handful of people cared about the environment Then Rachel Carson a marine biologist and conservationist wrote the very influential book Silent Spring Her book discussed how the harmful pesticide DDT was to animals and humans This book led to a radical environmental movement Many events also helped contribute to the movement The oil spills on the coast of California and Massachusetts the highly publicized threat of extinction to many species and the Cuyahoga River in Cleveland Ohio catching fire have ignited an environmental movement Environmentalists scientists and many other people conducted more research and depended on the development of advanced technology to educate the people and to save the Earth In December of 1970 the United States Environmental Protection Agency originated to address and help the various environmental issues EPA 2011 The Chernobyl disaster along with several other worldwide incidents sparked further reform In 1987 world leaders signed the Montreal Pact supporting the environmental cause 2 Explain the main point concerning exponential growth and whether it is good or bad Compare exponential growth to a logistic growth curve and explain how these might apply to human population growth What promotes exponential growth What constrains population growth Exponential growth is the rate of increase of a constant percentage of the current size Furthermore exponential growth contends that population increase is dependent on the population not lacking in resources such as food or water while not being affected by disease Exponential growth has no upper limit and grows very quickly The logistic growth curve which is the S shape has a limit If the rate of increase in population were constant the exponential growth chart would show population increasing substantially because there is no limit to population With a logistic curve the growth rate depends on population density and is restricted by carrying capacity The growth rate declines as the population increases Exponential growth is promoted when the environment can hold and support a growing number of inhabitants when health conditions are favorable and include a steady death rate Population growth is constrained by many variables including environmental issues medical reasons ideology and natural deaths These constraints would include but not limited to disease birth control accidents and natural disasters etc Environmental Science Worksheet 2 SCI256 Version 4 3 Compare predictions for human population growth in developed countries versus developing countries Why is it difficult to predict the growth of Earth s human population Why should population growth be predicted What will happen if there is exponential human growth Most growth occurs in developing countries where there is still a lack of birth control whereas it is opposite in developed countries who do have birth control Developed countries have smaller growth rate due to education knowledge healthcare and longer lifespans Developing countries are still adapting to alternative familyplanning methods and technological advances For instance families of various religious backgrounds and families who make their living as farmers have different beliefs Global Change 2006 It is difficult to determine or predict what the earth s population growth will be because of natural calamities like disease famine and war Ashline and EllisMonaghan 2000 state through use of the logistic curve to determine the inflection point it is difficult to predict the growth of Earth s human population because until a population has actually reached the inflection point they cannot project the final logistic size The world population should be predicted because it helps to ready the world for necessities This would include more doctors medicines farms and food infrastructure housing and fresh water If there is exponential human growth it could have serious and lasting damage to the environment as well as the global economy Because earth has limited space and resources the exponential human growth would be devastating to the nonrenewable resources 4 How do principles of system theory apply to the Earth as a living system Explain interactions between humans and natural ecosystems The system theory was aimed to unify the many scientific concepts and approaches used to understand the natural and humanconstructed environments Lee 2002 The principles apply to the Earth as a living system to show the interaction of water land air and life human and the effect of human activities on Earth systems Lee 2002 para 28 The system theory can connect the systems and show a balance Life interacts with its environment on many levels A single bacterium in the soil interacts with the air water and particles of soil around it within the space of a fraction of a cubic centimeter A forest extending hundreds of square kilometers interacts with large volumes of air water and soil While humans interact with and attempt to control the Earth which is itself a living system the effects could be devastating What must ultimately occur is a balance between the systems so that one system does not harm the other Environmental Science Worksheet 3 SCI256 Version 4 References Ashline G EllisMonaghan J 2000 Population Models in Biology and Demography Tools for Teaching St Michael s College COMAP Inc Retrieved November 17 2012 from httpacademicssmcvtedugashlinepapers0020UMAP20Population20Models oA20modulepdf EPAGov 201 1 EPA History Retrieved November 16 2012 from httpwwwepadovaboutepahistorvindexhtml Global Change 2006 Population Growth over Human History The Demographic Transition Retrieved November 17 2012 from httpwwwdlobalchandeumichedudlobalchanoe2currentlectureshuman bobhuman pophtml Lee H 2002 Systems Theory and the Earth Systems Approach in Science Education ERIC Digest Retrieved November 17 2011 from httpwwwericdigestsorg20041earthhtm
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