How Scientists Work
Section 1.2 p. 8-15
n Designing an Experiment
n Asking a Question
n ?
n Forming a Hypothesis
n – organisms can come from non-living matter, ex: maggots come from rotting meat
n Francesco Redi – .
.
n Designing an Experiment
n Setting Up a Controlled Experiment
n An experiment should test only one variable at a time.
n Manipulated variable – .
.n Responding variable – .
___________________________________________________________n Redi’s Experiment (explain or draw Redi’s experiment)
n Recording and Analyzing Results
n .
n Drawing a Conclusion
n .
n Repeating Investigations
n ______________________
n Attempted to disprove Redi’s conclusions
n ______________________
n Repeated Needham’s experiment, ultimately supporting Redi’s conclusions
n Pasteur
n Showed that all living things come from other living things
(explain or draw Pasteur’s experiment)
n How a Theory Develops
n Theory – ________________________________________________________________
________________________________________________________________________