What was the control group in Pasteur experiment?
Correspondingly, what was the control in Pasteur's experiment?
Pasteur's experiments contained both positive controls (samples in the straight necked flasks that he knew would become contaminated with microorganisms) and negative controls (samples in the sealed flasks that he knew would remain sterile).
Also Know, why did Pasteur bend the neck of the flask? He concluded that germs in the air were able to fall unobstructed down the straight-necked flask and contaminate the broth. The other flask, however, trapped germs in its curved neck, preventing them from reaching the broth, which never changed color or became cloudy.
Simply so, what was the independent variable in Pasteur's experiment?
The independent (manipulated) variable was the gauze. The dependent variable was what resulted from leaving the control group open, which was the appearance of maggots. One jar of meat was open, and the other jar of meat was covered with gauze.
What was Pasteur's hypothesis?
Pasteur's Problem Where do the microbes come from to cause broth to decay. Hypothesis: Microbes come from cells of organisms on dust particles in the air; not the air itself.