What is the advantage of using the electromagnetic spectrum model? It helps compare frequencies of light.

It helps change the wavelengths of light.

The color of light waves can be changed using the model.

The intensities of light waves can be changed using the model.

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