Author Question: Frost action is most effective ____. A)in high mountains B)where the temperature rarely drops below ... (Read 30 times)

jparksx · **on:** Jul 13, 2018

Frost action is most effective ____.
A)in high mountains
B)where the temperature rarely drops below freezing
C)where Earth materials are permanently frozen
D)where temperature has little fluctuation
E)in low canyons

Question 2

Most of the productive coal beds of Paleozoic age are found in rocks formed during the ___________________ _ period.
Fill in the blank(s) with correct word