Only one president, <u><em>Woodrow Wilson</em></u>, had a doctorate, and was president of Princeton University before becoming the U.S. President.
A student buries an ice cube in a pan of dirt and observes the dirt as the ice cube melts. This activity is a model of the formation of a kettle.
Answer:
They have a shared economy.
They allow easy migration
The correct option is C.
The position of a place on the equator is usually measured in degree of latitude. Latitude is the geographical coordinate, which specifies the north south position of a point on the earth surface. Lines of latitudes are called parallels. The equator is zero degree, the north pole is 90 degree north and the south pole is 90 degree south.
At the center of the Earth is the core, which has two parts. The solid, inner core of iron has a radius of about 760 miles (about 1,220 km), according to NASA. It is surrounded by a liquid, outer core composed of a nickel-iron alloy. The outer core is about 1,355 miles (2,180 km) thick.
