Scientific method 2

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Scientific method 2

  1. 1. Scientific Method Basic Steps (The Rattlesnake Experiment)03/02/13 By W. Ribbeck
  2. 2. Definition►Scientific method: basic steps that scientists follow in uncovering facts and solving scientific problems
  3. 3. Basic Parts of Scientific Method► Stating the problem► Gathering information► Suggesting an answer for the problem► Performing an experiment to see whether the suggested answer makes sense► Recording and analyzing the results of experiments or other observations► Stating conclusions
  4. 4. Stating the Problem►What invisible trail does a rattlesnake follow in tracking down its bitten prey?
  5. 5. Gathering Information► A rattlesnakes eyes are only sensitive to visible light► A pair of organs located under the eyes detect invisible light in the form of heat► A rattler’s tongue “smells” certain odors in the air► The sight or smell of an unbitten animal does not trigger the rattler’s tracking action
  6. 6. Hypothesis►After the snake wounds its victim, the snake follows the smell of its own venom to locate the animal
  7. 7. Experiment► Drag a dead mouse that has been struck and poisoned by a rattlesnake along a curved path on the bottom of an empty cage► Place the snake in the cage► The snake follows the exact trail that has been laid out► Control► Drag an unbitten dead mouse along the path► The snake seems disinterested
  8. 8. Recording and Analyzing Data►Do the experiment many times►Record the data
  9. 9. Conclusion►The scent of venom wasthe only factor that couldcause a rattlesnake tofollow its bitten victim.
  10. 10. Conclusion►The scent of venom wasthe only factor that couldcause a rattlesnake tofollow its bitten victim.

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