What is found in large quantities in the earth's crust
a. iron
b. nickel
c. silicon
d. magnesium

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Where is the only location in the united states where you drive on the left side of the road?

Which domain endings indicate websites that are most likely to be reliable sources? check all that apply. sites ending in .net