The is made up of all of earth's land and the ocean floors.
a. atmosphere
b. lithosphere
c. hydrosphere
d. biosphere

A, as , to a , as a , is as a. b. c. d.

In order from largest to smallest what are earths five main oceans

In russia which of these challenges affects the transportation of both petroleum products and other goods? a poorly repaired roads b harsh weather and vast distances c frozen waterways d separatist movements