Scientific Method. Steps in the Scientific Method (SM) Observation Observation Hypothesis Hypothesis Experiment Experiment Data Collection Data Collection.
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Post on 22-Jan-2016
<ul><li><p>Scientific Method</p></li><li><p>Steps in the Scientific Method (SM)ObservationHypothesisExperimentData CollectionConclusionPublishRetest</p></li><li><p>Observations</p><p>Gathered through using your sensesA scientist notices something occuring in their natural world</p></li><li><p>Observations</p><p>An example of an observation might be noticing that many deer are dying by being hit by cars driving tooFast. </p></li><li><p>Hypothesis</p><p>A suggested solution to the problem.Must be testable(Super important)Sometimes written as IfThen statementsPredicts an outcome</p></li><li><p>Hypothesis</p><p>An example of a hypothesis might be that more deer will live if the speed limit was lowered. </p></li><li><p>Experiment</p><p>A procedure that tests the hypothesis.</p></li><li><p>Experiment</p><p>Variable factor in the experiment that is being tested</p></li><li><p>Experiment</p><p>A good or valid experiment will only have ONE variable being tested!</p></li><li><p>Controls and Variables</p></li><li><p>Scientific Experiments Follow RulesAn experimenter changes one factor and observes or measures what happens.</p></li><li><p>The Control VariableThe experimenter makes a special effort to keep 1 factor the same or unchanged so that they will not effect the outcome. Those factors are called control variables. </p></li><li><p>What is the Purpose of a Control?Controls are NOT being testedControls are used for COMPARISON</p></li><li><p>Other VariablesThe factor that is changed is known as the independent variable. The factor that is measured or observed is called the dependent variable. </p></li><li><p>You Are Already Scientists!For example, suppose you want to figure out the fastest route to walk home from school. You will try several different routes and time how long it takes you to get home by each one. Since you are only interested in finding a route that is fastest for you, you will do the walking yourself.</p></li><li><p>What are the Variables in Your Experiment?Different routes are the independent variable.(changing) The time it takes is the dependent variable (being measured)Keeping the same walker (yourself) throughout makes the walker a control variable.(used for comparison) </p></li><li><p>One more thing it is best to make several trials with each independent variable. The more datathe better.</p></li><li><p>Valid ExperimentsMr. G exampleLochsa River Madness Class example</p></li><li><p>Remember: To be a Valid (Good) Experiment:Two groups are required --- the control & experimental groupsThere should be only one variable being tested.</p></li><li><p>DataIs Results (recordings) of the experimentMay be quantitative (numbers) or qualitative</p></li><li><p>DataMust be organizedCan be organized into charts, tables, or graphs</p></li><li><p>Conclusion</p><p>The answer to the hypothesis based on the data obtained from the experiment</p></li><li><p>Publish and Retest</p><p>In order to verify the results, experiments must be retested.</p></li><li><p>Publish in peer reviewed journal.Peer reviewed means that once your study is done, many other scientists with knowledge of your study go through how your experiment was performed. If they find ANYTHING wrong or untrue, the experiment is not published. </p><p>Basically, a peer reviewed published study is very trustworthy.Problems with studies that arent peer reviewed? Hidden motives?</p></li><li><p>Solving a Problem1)Identify a Problem2) State Observations about the problem3) Form a Hypothesis about the problem (ifthen)4) Design an Experiment to test the hypothesis5) Collect Data6) Form a Conclusion7) Retest</p></li></ul>
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