Please I need help --> Calculate the approximate diameter of Earth. Use the lowest figure for the thickness of the crust. Show your work.

The point where two air masses meet is called a

In the construction of new housing development, which factor of production can be categorized as land?

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.