Rodrigo

Chemistry

2 August, 01:49

Megan experimented with growing mold. She took 3 pieces of bread from the same loaf and placed

each into a plastic sandwich bag. Before sealing the bag. she added 5 drops of water to each slice.

Next, she placed one bag on her window sill, one in a dark cabinet, and one in a room away from

sunlight. Megan concluded that the different amount of mold that grew on each slice was due to the

amount of light it received. Is this a valid conclusion?

Yes, because the light was the manipulated variable.

O Yes, because the light was the controlled variable.

O No, because the light could not have affected the growth

O No, because the light should have been the same for each bread slice,