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Scientific Method

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Scientific Method Presented by Ms. Alvarez CT: Mrs. Rojas * Scientific Method Organized series of events used by scientist to answer questions Steps in the Scientific ... – PowerPoint PPT presentation

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Title: Scientific Method


1
Scientific Method
Presented by Ms. Alvarez CT Mrs. Rojas
2
Scientific Method
Organized series of events used by scientist to
answer questions
3
Steps in the Scientific Method
  • Make observations,ask questions,and do background
    research
  • Generate a hypothesis
  • Design and perform experiments to test hypothesis
  • Collect and record data
  • Analyze data and draw a conclusion
  • Report your results

4
Observations
  • Gathered through your senses
  • A scientist notices something in their natural
    world

5
Observations
  • An example of an observation might be noticing
    that many salamanders near a pond have curved,
    not straight, tails

6
Hypothesis
  • A suggested solution to the problem.
  • Must be testable
  • Sometimes written as IfThen statements
  • Predicts an outcome

7
Hypothesis
  • An example of a hypothesis might be that the
    salamanders have curved tails due to a pollutant
    in the moist soil where they live.

8
Experiment
  • A procedure to test the hypothesis.

9
Experiment
  • Variable factor in the experiment that is being
    tested

10
Variables
  • The factor that is changed is known as the
    independent variable.
  • The factor that is measured or observed is called
    the dependent variable.

11
Scientific Experiments Follow Rules
  • An experimenter changes one factor and observes
    or measures what happens.

12
What is the Purpose of a Control?
  • Controls are NOT being tested
  • Controls are used for COMPARISON

13
Data
  • Results of the experiment
  • May be quantitative (numbers) or qualitative

14
Data
  • Must be organized
  • Can be organized into charts, tables, or graphs

15
Conclusion
  • The answer to the hypothesis based on the data
    obtained from the experiment

16
Reporting Data
  • Publish results in Journals
  • Present results at meetings
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