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The Scientific Method.

Presentation on theme: "The Scientific Method."— Presentation transcript:

The Scientific Method

The Scientific Method Way to solve a problem Step by step plan
Tries to answer a question

The Scientific Method The Scientific Method has 6 steps: Problem
Research Hypothesis Experiment Data Conclusion

Step 1 - Problem/Question
You ask a question about what you observe.

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

Step 3 - Hypothesis Prediction that can be tested by an experiment
Answers the problem/question May be written in the form If …. then …..

Good Hypothesis Both an independent and dependent variable
Declarative statement - NO I’s or We’s or My or Our

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

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!!

Dependent variable: what is MEASURED during the experiment
- affected by the independent variable

Constant Variables: - variables that are kept the SAME
- makes the experiment FAIR - there are MANY in an experiment

Experimental Group: - the group that you are testing
- group that gets the factor you are testing - group that gets the independent variable

Control Group: - group that DOES NOT get the factor you are testing
- group that you check your results against - used to compare results

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

Step 5 - Observations/Data
Record any observations and data

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

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

Graphs Line Graph describes how one factor affects a second factor
Continuous data

Graphs Circle Graph compares percentages Compares part of a whole

Graphs Column or Bar Graph used for comparison discreet data points

Step 6 Conclusion accept or reject your hypothesis
Support your answer with the data Publish your results

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