Asap.
which of these experiments would make use of qualitative data?
a study of different shapes to compare rolling friction values.
a study of different surfaces to compare luster or shine.
a study on the effects of sunlight on the growth rate of plants.
a study on the change in freezing point of water when salt is added.

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables