The tigris and euphrates rivers originate in present-day
a. turkey.
b. persia.
c. egypt.
d. iran.

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today

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.

[fw.02]sinkholes are often formed as a result of the actions of. a.heat on recharge b.pressure on aquifers c.acid in groundwater d.minerals in hot springs