scientific method aim #4. describe the process of the scientific method and the skills scientists...
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SCIENTIFIC METHODAIM #4. Describe the process of the scientific method and the skills scientists use
•*The term Scientific Method comes from the definition of science as "knowledge" and the Greek word methodos, meaning "pursuit" or "going after."
WHY DO WE USE THE SCIENTIFIC METHOD?Because it…
• (A) Is a way to obtain information. (Data) • (B) Is logical. • (C) Uses problem solving skills in an orderly manner.
HOW DO WE USE THE S.M.?
• 1. Define the problem by making
observations.
• 2. Form a hypothesis. "An Educated
Guess"
• 3. Do an experiment. Make observations –
NOT INFERENCES!
CONTINUED…
• 4. Analyze data.
• 5. Draw conclusions. (Answer hypothesis)
• 6. Communicate results.(Report)
After many studies we found that…
WHAT NEXT?
If your experiment is CONSISTENTLY TRUE
7. Theory – set of related hypotheses that have been tested and confirmed by many scientists.
• Example: Cell Theory
HOW DO WE DESIGN AN EXPERIMENT??
Experiment - an organized procedure or method to test a hypothesis.
All experiments MUST HAVE: • Control - a standard for comparison
• No variable (Ex. plain water)
• Constants - factors that do not vary (do not change) in an experiment.
• They must remain the same. (Ex. brand, height....)
WHAT ARE OUR VARIABLES?
• Independent variable - factor changed by the experimenter (the factor
tested) - a good experiment tests one variable.
• Dependent variable - factor that depends on the value of the independent
variable (a result measured)
HOW DO I REMEMBER ALL OF THIS?!