Choose all the answers that apply. The ionosphere .

is used to send radio waves
blocks harmful x-rays
is warmed by the ozonosphere
includes all the layers after the mesosphere
contains charge atoms

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.