A student wants to see how temperature affects the
production of gases when yeast and water are mixed. She
mixes them at different temperatures in clean soda
bottles. She then places a balloon over the top of each
bottle.
which statement best describes the use of the balloons in this experiment?
A. It is imaginative, because it makes the experiment feel like a party
B. It is creative, because it allows the student to add color to the
experiment
c. It is logical, because it allows the student to catch any invisible
gases given off
O D. It is biased, because it means that not all the variables are properly
controlled