scientific method
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Scientific MethodScientific Method
Scientific MethodScientific Method• Steps used to gather information and solve problems
Scientific MethodScientific Method1. Identify a problem or
question that could be tested
2. Research to find out what is already known
Scientific MethodScientific Method3. Form a
hypothesis
Scientific MethodScientific Method4. Test the hypothesis
(experiment)
Scientific MethodScientific Method5. Record and study the data6. Form a conclusion
Scientific MethodScientific Method7. Communicate the results
Key TermsKey Terms• Hypothesis- testable
question• Usually an “if” “then”
statement • Example:
Key TermsKey Terms• Problem – to reduce the number of
students arriving late to class
• If there is a warning bell 30 sec. before each class, then
• more students will arrive on time
Key TermsKey Terms• Control- the group or subject
that has all normal or standard conditions
• Control group is necessary to compare the experimental groups to
Key TermsKey Terms• Variable- a condition that could be
different
• Independent Variable- the only condition that is changed for the experiment
• The variable that “I” change as the experimenter
Key TermsKey Terms• An experiment should have
only one independent variable
• Example:
Key TermsKey Terms• Mrs. C. wanted to test the effect
of different food coloring in food chosen by students
• She prepared mashed potato servings exactly the same except for the color
Key TermsKey Terms• The dependent variable is
the condition that might change as a result of the independent variable
• Example:
Key TermsKey Terms• Mrs. C. wanted to test the effect
of different food coloring in food chosen by students
• The dependent variable that she could observe is which potatoes the students chose
Key TermsKey Terms• Constant- condition(s) that is/are the same for trials