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Physical Geology Chapter 1
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Earth Science Study of the earth and its place in the universe Causes of natural events can be discovered through observation and/or experimentation Chinese earthquakes in 780 BCE Greek rocks in 200 BCE Mayan celestial observations (calendar)
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Branches Oceanography Meteorology Astronomy Environmental Science GEOLOGY
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Oceanography Study waves, tides, currents, floor and water itself ¾ of surface Relatively new
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Meteorology A study of Atmospheric conditions,i.e., weather Relatively new Relatively accurate
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Astronomy The universe beyond the earth of which it is a part Practical results Ancient study –Calendars –Zodiac –Other constellations
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Environmental Science Study of how humans interact with their environment, especially the abiotic Practical (helps us to survive)
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Geology Study of origin, history, processes, and structure of the earth Ancient study Very practical –Equipment –Resources –Prediction
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Geology Impacts Past environments Availability of resources Understand and interact properly and safely with environment –Roads, buildings, other structures –Conservation and preservation Natural forces –Volcanoes and earthquakes
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Goal of Science Explain natural phenomena Use observation, based upon predictability of nature Use experimentation Pure science vs. applied science Improve quality of life
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<Ask a question? Go together< Whether conclusion is right or wrong
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Observations lead to questions
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Research may help
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A hypothesis is a tentative answer
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Experiments test hypotheses
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Experimental components Variable – something that changes in a controlled experiment Independent variable – controlled by you Dependent variable – change as a result Control – standard for comparison with no variables Experiment – control plus a variable Data/observations – information or results collected from experimentation
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Draw a conclusion based upon your results
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If successful, results should be repeatable. If not successful, a new hypothesis may be necessary, with testing and conclusion to follow
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<Ask a question? Go together< Whether conclusion is right or wrong
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Metrics – How the world measures Except U.S. and Burkina-Faso Current form is the S.I. (Systeme Internationale Easier than Imperial or English Based on units of 10
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Measurement Vocabulary Accuracy – how close measurement is to true value Precision – exactness of value Error – amount of imprecision or variation % Error – (accepted value minus experimental value divided by accepted value) multiplied by 100 Confidence interval – range of values for a set % of measurements
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Models To simulate conditions in the natural world A description, representation, or imitation of an object, system, process, or concept Give an example of a –Physical model –Graphical model –Conceptual model –Mathematical model –Computer model
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Scientific Conclusions Published or presented Peer review Development of theory (a consistent explanation that is repeatable) Support from other disciplines?
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