Presentation on theme: "Objectives Outline the main steps in the scientific method"— Presentation transcript:
1Objectives Outline the main steps in the scientific method List the elements of a controlled experiment
2The Tools of Science The Scientific Method General steps in the scientific methodObserve (question)Hypothesis (prediction)Testing/ExperimentationAnalyzeRepeat the test or devise a new oneReport
3ObservationYou notice that these plants are not the same size.Collect some data.
4HypothesisFull SunShadeHypothesis: An educated guess that attempts to answer the question at handIf plants are in full sunlight then they grow taller because they can photosynthesize more.
5Develop ways to test your hypothesis. Controlled experiment The only factor that will change. In this case; light.All other factors are the same; soil, moisture, fertilizer, etc.Controlled LightDevelop ways to test your hypothesis.Controlled experimentDetermine the independent variable (what you are changing)
6All variables remain constant. Experimental group Results from the experimental group will be compared to the control groupShade, no direct lightMore Controlled LightControl.Less controlled lightControl groupAll variables remain constant.Experimental groupThe group where the independent variable is changed
7Any changes that resulted from manipulating the independent variable ExperimentShade, no direct lightMore Controlled LightControl.Less controlled lightDependent variableAny changes that resulted from manipulating the independent variablePortion of experiment you can measure. Ex. Height of plant
8Variables Independent variable (changing) Amount of lightDependent variable (can measure)Growth of plantExperimental groupPlants in full sunlightControl groupPlants in partial sunlight
9Data- Collect information, typically in the form of a chart to show what was measured in the experiment.Height of plant (cm)DaysFullsunlightPart14 cm46 cm5 cm77 cm108 cm1310 cm
10AnalysisAnalyze your data. If you had statistical data you collected, you would show results in a graph.Dependent variable (what is being measured) – y axisIndependent variable (what is being changed) – x axis
11Guess what I found out!?... Conclusion Conclusion: Simply state whether or not your data supports your hypothesis.Ex. “Based upon the results of my experiment “