In the landscape, sandstone rocks most often become weathered when

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

At which point on the diagram do convection currents occur to drive plate movement?

Uncle tom's cabin started out as a series of articles printed in the national era, a newspaper.