Dan wants to test the effects of different amounts of antibiotic on bacteria. while setting up his experiment he makes sure to use the same type of antibiotic, the same type of bacteria, and the same type of incubator for each trial. which phrase below best describes this part of the experiment?
a.
analyzing results
b.
collecting data
c.
choosing controlled variables
d.
making a prediction

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.