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Just What Is Science          Anyway???a journey through the scientific method...
Science is a process of inquiry - asking questions and getting answers you do science there are many sciences   life scien...
Observationbefore you can ask a question - you need tomake an observation…2 kinds  Direct observation- done w/ the 5 sense...
The Scientific Method a very good way to do science easy to follow repeatable thorough is the way it’s really done in the ...
What’s the Purpose?? you need to state the goal of your investigation - called the Purpose (or Problem) Statement   it nee...
The “magic” purpose statement The purpose of this experiment is to determine the effect of ______(iv)_______ on the ______...
Procedureyou need to list the steps that you are goingto (or did) take to carry out your experimentit must be so detailed ...
The Rope Problem!!!
Variables to vary - to change Independent (manipulated) Variable (IV) - the part of the experiment that you change Depende...
more... Controlled Variables - the parts of your experiment that do not change WHY have these? Control Group - the part of...
An Hypothesis….. ..is an educated prediction - “educated” implies that the predictions are based on research and your prio...
Paper Towel Lab Come up with an agreed general procedure Procedure/variables might get altered Keep all other variables co...
Data Presentation data tables   a simple way to organize your data graphs   to help your data make visual sense   trends
Data tableMass of Ramp       Ramp     Time    Ave.cart (g) angle     length   (s)     time (s)         (deg)     (cm)40.00...
Units of measureMass of Ramp       Ramp     Time    Ave.cart (g) angle     length   (s)     time (s)         (deg)     (cm...
Significant digitsMass of Ramp      Ramp     Time    Ave.cart (g) angle    length   (s)     time (s)         (deg)    (cm)...
Significant digits...…are a way to show how accurate themeasurements are(depends instrument is being used)Example: Triple ...
Highlight important stuffMass of Ramp      Ramp     Time    Ave.cart (g) angle    length   (s)     time (s)         (deg) ...
Give it a clear titleMass of Ramp      Ramp     Time    Ave.cart (g) angle    length   (s)     time (s)         (deg)    (...
Conclusions INTERPRET THE DATA: what do all of these numbers mean? do they answer the problem statement? why or why not?
Analyze for errors …  what factors skewed your  data?  how far off were the results?  Look to see if any trials were  “out...
Reflect…. What link to our studies did this lab have? Did you learn anything new, any surprises? Any comments or questions...
Precision vs. Accuracy  if your data is accurate it is close toits true value if your data is precise it isconsistent from...
Precision vs. Accuracy             this is precise but             not accurate
Precision vs. Accuracy             this is precise and             accurate
Accuracy comes from________?Precision comes from________?       Answers: equipment                people
All Done...
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Scientific method

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Transcript of "Scientific method"

  1. 1. Just What Is Science Anyway???a journey through the scientific method...
  2. 2. Science is a process of inquiry - asking questions and getting answers you do science there are many sciences life science poli-science social science etc
  3. 3. Observationbefore you can ask a question - you need tomake an observation…2 kinds Direct observation- done w/ the 5 senses sight, touch, smell, aural, taste Indirect observation - done w/ equipment thermometer, anemometer, balance...
  4. 4. The Scientific Method a very good way to do science easy to follow repeatable thorough is the way it’s really done in the field! (BUT NOT THE ONLY WAY!)
  5. 5. What’s the Purpose?? you need to state the goal of your investigation - called the Purpose (or Problem) Statement it needs to be clear to you (and the reader) exactly what you are investigating
  6. 6. The “magic” purpose statement The purpose of this experiment is to determine the effect of ______(iv)_______ on the _______(dv)_______.
  7. 7. Procedureyou need to list the steps that you are goingto (or did) take to carry out your experimentit must be so detailed so that anyone whomay dispute your work can reproduceexactly what you did
  8. 8. The Rope Problem!!!
  9. 9. Variables to vary - to change Independent (manipulated) Variable (IV) - the part of the experiment that you change Dependent (responding) Variable (DV) - the part of the experiment that changes as a result of changing the independent variable (the outcome)
  10. 10. more... Controlled Variables - the parts of your experiment that do not change WHY have these? Control Group - the part of the experiment that is your basis for comparison (you don’t do anything to this group)
  11. 11. An Hypothesis….. ..is an educated prediction - “educated” implies that the predictions are based on research and your prior experiences. Should be stated in “If... Then… statements Ex:“If a car’s mass is increased then it will go faster down a ramp.”
  12. 12. Paper Towel Lab Come up with an agreed general procedure Procedure/variables might get altered Keep all other variables constant!!! No out of control experimentation!) EVERYONE takes notes in lab group! Make sure you use measuring tools properly. (accuracy counts in grade)
  13. 13. Data Presentation data tables a simple way to organize your data graphs to help your data make visual sense trends
  14. 14. Data tableMass of Ramp Ramp Time Ave.cart (g) angle length (s) time (s) (deg) (cm)40.00 45.0 35.0 11.3040.00 45.0 35.0 12.10 11.7025.00 45.0 35.0 10.9025.00 45.0 35.0 11.90 11.40 Table 1: Cart speed based on cart mass
  15. 15. Units of measureMass of Ramp Ramp Time Ave.cart (g) angle length (s) time (s) (deg) (cm)40.00 45.0 35.0 11.3040.00 45.0 35.0 12.10 11.7025.00 45.0 35.0 10.9025.00 45.0 35.0 11.90 11.40 Table 1: Cart speed based on cart mass
  16. 16. Significant digitsMass of Ramp Ramp Time Ave.cart (g) angle length (s) time (s) (deg) (cm)40.0 45.0 35.0 11.3040.0 45.0 35.0 12.10 11.7025.0 45.0 35.0 10.9025.0 45.0 35.0 11.90 11.40 Table 1: Cart speed based on cart mass
  17. 17. Significant digits...…are a way to show how accurate themeasurements are(depends instrument is being used)Example: Triple beam balancemeasures to the nearest tenth of agram, therefore all mass measurementsshould only go out one decimal point
  18. 18. Highlight important stuffMass of Ramp Ramp Time Ave.cart (g) angle length (s) time (s) (deg) (cm)40.0 45.0 35.0 11.3040.0 45.0 35.0 12.10 11.7025.0 45.0 35.0 10.9025.0 45.0 35.0 11.90 11.40 Table 1: Cart speed based on cart mass
  19. 19. Give it a clear titleMass of Ramp Ramp Time Ave.cart (g) angle length (s) time (s) (deg) (cm)40.0 45.0 35.0 11.3040.0 45.0 35.0 12.10 11.7025.0 45.0 35.0 10.9025.0 45.0 35.0 11.90 11.40 Table 1: Cart speed based on cart mass
  20. 20. Conclusions INTERPRET THE DATA: what do all of these numbers mean? do they answer the problem statement? why or why not?
  21. 21. Analyze for errors … what factors skewed your data? how far off were the results? Look to see if any trials were “outliers” What should be done next time to reduce any errors?
  22. 22. Reflect…. What link to our studies did this lab have? Did you learn anything new, any surprises? Any comments or questions? Anything you might add? What happened with your hypothesis and why was it right or wrong?
  23. 23. Precision vs. Accuracy if your data is accurate it is close toits true value if your data is precise it isconsistent from trial to trial
  24. 24. Precision vs. Accuracy this is precise but not accurate
  25. 25. Precision vs. Accuracy this is precise and accurate
  26. 26. Accuracy comes from________?Precision comes from________? Answers: equipment people
  27. 27. All Done...
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