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The Scientific Method

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**The Scientific Method Way to solve a problem Step by step plan**

Tries to answer a question

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**The Scientific Method The Scientific Method has 6 steps: Problem**

Research Hypothesis Experiment Data Conclusion

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**Step 1 - Problem/Question**

You ask a question about what you observe.

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Step 2 - Research Gather information about the problem through observations, books, internet, or past experience. What do you know?

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**Step 3 - Hypothesis Prediction that can be tested by an experiment**

Answers the problem/question May be written in the form If …. then …..

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**Good Hypothesis Both an independent and dependent variable**

Declarative statement - NO I’s or We’s or My or Our

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Step 4 - Experiment way to test the hypothesis and collect data under controlled conditions The outcome must be measurable

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**Independent Variable:**

- factor that is TESTED - what is DIFFERENT between the groups - what CHANGES between each set-up THERE IS ONLY ONE INDEPENDENT VARIABLE IN AN EXPERIMENT!!

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**Dependent variable: what is MEASURED during the experiment**

- affected by the independent variable

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**Constant Variables: - variables that are kept the SAME**

- makes the experiment FAIR - there are MANY in an experiment

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**Experimental Group: - the group that you are testing**

- group that gets the factor you are testing - group that gets the independent variable

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**Control Group: - group that DOES NOT get the factor you are testing**

- group that you check your results against - used to compare results

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**Good Experiments large sample size**

one factor tested (one independent variable) quantitative or measurable results Large sample size Repeated for accuracy

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**Step 5 - Observations/Data**

Record any observations and data

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**Observations Qualitative Observation**

qualities (observable but not measurable) no numbers examples: color, shape, smell, texture

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**Observations Quantitative Observations**

quantities (observable AND measurable) numbers examples: length, volume, temperature

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**Graphs Line Graph describes how one factor affects a second factor**

Continuous data

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Graphs Circle Graph compares percentages Compares part of a whole

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Graphs Column or Bar Graph used for comparison discreet data points

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**Step 6 Conclusion accept or reject your hypothesis**

Support your answer with the data Publish your results

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