A “mystery” in our understanding of plate tectonics has been, until recently, the nature of the power source capable of moving the plates and the continents embedded within them. Recent evidence indicates the power source to be ____.

  Steep sea cliffs on erosional coasts are usually caused by ____.

Find the auxiliary equation for the following differential equation.x2y” – 4y’ + 4y = 6

  Which is the highest atmospheric layer gradually giving way to space?

  The turbulent layer of Earth’s atmosphere in which nearly all weather occurs is called the ____.

 Tidal bores usually occur ____.

  A transverse current is a ____.

  The dependable surface winds of Earth centered at about 15° north and south latitudes are called the ____.

A sverdrup (sv) is a measure of ____.

 Which of the following statements is true about an Ekman spiral?