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Scientific Investigations

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Scientific Investigations A scientific method is a planned, organized approach to solving a problem. The Nature of Scientific Investigations Ask a Question Good ... – PowerPoint PPT presentation

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Title: Scientific Investigations


1
Scientific Investigations
  • A scientific method is a planned, organized
    approach to solving a problem.

2
The Nature of Scientific Investigations
3
Ask a Question
  • Good questions come from careful observations.
  • Questions beginning with what, why, how, and when
    are very important.
  • This is also called Purpose at times.

4
Research
  • Gather information to your question.
  • Design a test identify and define the variables.
  • Document all information.
  • Do Not rely on one source.

5
The Nature of Scientific Investigations
  • Once the problem is defined and research is
    complete, a hypothesis, or suggested explanation
    for an observation, is made.

6
Hypothesis
  • Determine what you can change.
  • Turn the question into a statement that explains
    what you are changing and what you think the
    effect(s) of the change will be.
  • Write in an IFthen format the If is the
    change made or manipulated, and the Then
    (responding) portion tells the effects of the
    change.

7
Experiment or Test
  • Select a sample.
  • Determine how the variables will be controlled
    and measured.
  • Conduct the experiment and observe.
  • Record the results.

8
The Nature of Scientific Investigations
  • A hypothesis is tested by conducting an
    experiment
  • A good scientific experiment tests only one
    variable, or changeable factor, at a time.
  • The independent variable in an experiment is the
    factor that is manipulated by the experimenter.
  • A dependent variable is a factor that can change
    if the independent variable is changed.
  • A control is used to show that the results of an
    experiment are a result of the condition being
    tested.
  • A constant is a factor that does not change.

9
Analyze Data
  • Organize the data using graphs, tables, and
    charts.
  • Look for trends in the data.
  • Compare the data with the hypothesis and the
    prediction.

10
Conclusion
  • Describe the results and explain what they mean.
  • Describe major findings, and cite reasons for the
    findings.
  • Describe how the data supported ,or did not
    support your hypothesis.
  • Make recommendations for improving the
    experiment, and what needs to be investigated
    father.

11
Share the Info / Communicate
  • Complete a report on your findings.
  • Be able to orally let others know what you have
    learned.
  • Others may want to do this project.
  • Your report may lead to another question,
    possibly another investigation.
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