Which of the following causes the different densities of oceanic crust and continental crust?
a. ocean depth
b. types of rock
c. age of the rock
d. temperature of the rock

The larges lakes in the world are found in: asia europe north america south america

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.

The oil and gas found in the middle east are regulated by a. organization of petroleum exporting countries b. southwestern asian oil refineries c. north atlantic treaty organization