Exam 2: Plate Tectonics: a Scientific Revolution Unfolds

The Aleutian Islands occur at a _______.

Which of the following energy sources is thought to drive the lateral motions of Earth's lithospheric plates?

A(n)i_______s a long- lived, stationary magma source deep in the mantle, well below the base of the lithosphere.

Today, _______ is in about the same geographic position as during late Paleozoic time.

The _______is(are)a logical evolutionary analog of the African Rift Valleys ten million years from now.

Pull- apart rift zones are generally associated with a_______ plate boundary.

Japan and the Aleutian Islands have formed from a(n)_________to _________convergent boundary.

Deep ocean trenches are surficial evidence for_______ .

The San Andreas fault in California is a good example of a(n)_________plate boundary.

The _________today marks the location of the rift along which Africa separated from South America.

_______was an ancient reptile that lived in South America and Africa during the late Paleozoic.

The modern- day Red Sea is explained by plate tectonics theory because it is _______.

The temperature below which magnetic material can retain a permanent magnetization is called the_______ .

Critical thinking and discussion questions. Use complete sentences, correct spelling, and the information presented in chapter 2 to answer the questions below. -Describe exactly what type of plate boundary is illustrated below and explain your answer.

Although Alfred Wegener presented compelling evidence for his continental drift hypothesis (despite lacking a mechanism), why was the true nature of plate boundaries not determined until the 1960s?

Which one of the following is an important fundamental assumption underlying the plate tectonic theory?

In the early part of the twentieth century, _______argued forcefully for continental drift.

_______first related the symmetrical magnetic patterns in seafloor basalts to seafloor spreading at a mid- ocean ridge.