Which aspect of soil characteristics is a sieve used for? a) determining color. b) seperating soils by grain size. c) preventing moisture loss in soils. d) determining soil conservation techniques

Scientists think that convection currents flow in earth’s a. continents. b. mantle. c. lithosphere. d. inner core.

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?

Why did the belgian parliament pass laws to decentralize its government? a. to increase trade with neighboring luxembourg b. to decrease the political power enjoyed by the flemish c. to enable belgium to join the european union d. to reduce tensions between belgium's two main ethnic groups