Dubai - Oil = Power & Money, easily defendable
Rio de Janero = Largest trading port in south america
Emigrate means to leave ones country to live in another
In places where convection currents rise up towards the crust's surface, tectonic plates move away from each other in a process known as seafloor spreading (Fig. 7.21). Hot magma rises to the crust's surface, cracks develop in the ocean floor, and the magma pushes up and out to form mid-ocean ridges.