Use the drop down menus to complete the sentence describing the important ideas in Hess’s theory. Hess expanded on Wegener’s theory of BLANK. Hess proposed the idea that BLANK are places where crust is created

Which of the following may one conclude from a map that shows the average ph value of rainfall in the u.s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u.s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u.s.