1-2 Using Scientific MethodPresentation Transcript
Warm -up Suppose you want to test which brand of floor cleaner is the best. What materials would you need? What procedure would you follow? How would you determine which cleaner produced the best results?
1-2 Scientific Method Describe the steps of the scientific method. Apply the steps of the scientific method to real world scenarios.
Scientific Method A series of steps that scientists use answer questions and solve problems A logical, organized way to solve problems.
Steps of Scientific Method State the problem – Ask questions Gather information Form a Hypothesis Perform experiment and collect data Analyze/Interpret data Draw a conclusion
Scientific Method SIX GREAT FARMERS PLANT ALL DAY
Six: State the Problem The scientist identifies the question or subject that he/she wishes to study Clear, specific & defined
Great: Gather Information The scientist researches the subject that he/she is studying. Places to do research: library, internet, encyclopedia, television, etc.
Farmers: Form Hypothesis Prediction about the outcome of an experiment Proposed answer to the question Usually has the words “If... Then” IF I eat too much, THENI will get sick
Plant: Perform Experiment Scientists develop a way to test their hypothesis Manipulated Variable: part of the experiment that can be changed or controlled Responding Variable: What is measured in the experiment Controlled Variable: part of the experiment that remain unchanged
All: Analyze Data Scientists compile data into charts and graphs This helps make sense of the information taken from the experiment
Day: Draw Conclusions Scientist decides whether the original hypothesis was correct. If the answer is “YES” then you are done If the answer is “NO” then a new hypothesis is made and you repeat the experiment
Law vs. Theory Law – a rule of nature
Answers the question “what?”
Examples: Law of Attraction and Repulsion, Law of Universal Gravitation Theory – An explanation based on repeated experimentation and observation.
Answers the question “why”
Examples: Theory of Evolution, Atomic Theory
Law vs. Theory Theories do not become laws!!! What doesn’t replace why! A theory represents everything currently known about a topic. Everything known supports the theory. If anything is discovered that disproves the theory, the theory is dismissed or adapted to suit the new information. A theory is “worth” much more than a “fact”!
Conclusion What is the purpose of the scientific method? How does a scientific law differ from a scientific theory?