If a substance undergoes a chemical change, could its volume be changed? why or why not?

Does masterbation affect height growth or loss of growth hormone?

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

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