1. The United States is involved with many other countries through various international alliances. Identify each organization a their purpose: OAS, NATO, EU, NAFTA, APEC, WTO, IMF, TPP.

Which statements explain reasons why unconformities occur? check all that apply. rocks along a fault break and move. igneous rock forms at earth’s surface. rocks erode and sediment is deposited. no sediment is deposited over a long time. igneous rock forms between sedimentary layers.