VIEWS: 4 PAGES: 13

• pg 1
```									                Students
page 19
The Scientific Method
7 Steps of the Scientific Method
1.   State the Problem
2.   Research/ prior knowledge
3.   Hypothesis
4.   Experiment/ collect data
5.   Analyze the Data
6.   Conclusion
7.   Retest
1. State the Problem
• A question/           EXAMPLE:
problem that you
want to solve      Do plants need light
to grow?
2. Research
• Collect information     EXAMPLE:
• Prior knowledge       Prior Knowledge-
Plants in your
house, gardens,
green houses,
etc.
3. Hypothesis
• educated guess            EXAMPLE:
problem                   light then they
• Based on prior           will grow. With
knowledge and            out light, plants
research                 will wither and
• “If/Then statement”             die.
4. Experiment
• Test the hypothesis        EXAMPLE:
• Collect the data      • Set up different
• Must be measurable      groups of plants and
expose them to
different amounts of
light
• Measure the plants
to see which ones
grow the tallest
5. Analyze the Data
• Organize the data into:        EXAMPLE:
– A chart/ table         • Graph showing that
– A graph                  the plant that
light grew the
tallest.
6. Conclusion
• Accept or reject your
hypothesis                    I accept my
• State why you accepted    hypothesis because
or rejected                  the plants that
grew the tallest while
my plants that
7. Retest & Share
• Do several trials of your experiment:
• Share your results with other scientists
Medical Science
Scientific Method   High Cholesterol
State the Problem   Patient has high cholesterol
Research/ Prior     Research information about cholesterol
Knowledge
Hypothesis          Certain chemicals may dissolve
cholesterol deposits
Experiment          Give 100 patients these chemicals and
100 patients a placebo
Analyze             Same number of patients lowered their
cholesterol as did the placebo patients
Conclusion          These chemicals did not reduce
cholesterol
Retest/ Share       Modify hypothesis/ retest/ publish results
Everyday Science
Scientific Method   Car repair
State the Problem   Engine won’t turn over
Research/ Prior     Find reasons why engine won’t
Knowledge           turn over
Hypothesis          Predict that the battery is dead
Experiment          Replace battery
Analyze             Engine now turns on
Conclusion          Cars won’t work without a fully
Retest/ Share       Tell other people
Everyday Science
Scientific Method   Heart rate
State the Problem   Heart beats at different speeds
Research/ Prior     Find reasons why your heart rate
Knowledge           would change
Hypothesis          If I _______ then _______
Experiment          Take resting heart rates, and heart
rates after running.
Analyze
Conclusion
Retest/ Share

```
To top