Sarah wanted to find out If temperature has an effect on the growth of bread mold. She grew the mold in nine Petri dishes containing the same amount and type of nutrients. Three were kept at 0 C, three were kept at 90 C, and three were kept at room temperature, 27 C. The containers were examined and
the growth of the bread mold was recorded each Friday for five weeks.
The Independent or manipulated variable is:
temperature of the containers
growth of bread mold
number of containers at each temperature
amount of nutrients in container