Least likely to form a pyroclastic flow is

basaltic
andesitic
rhyolitic

Why might have people followed the rivers to find their way into asia

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.

How many time zone are there on earth