Geology Cafe

Introduction to Geology

Quiz 5 - Plate Tectonics

1. In 1912, Alfred Wegener proposed the basic outline of a hypothesis called:
a) uniformitarianism.
b) seafloor spreading.
c) catastrophism.
d) continental drift.
e) subduction.

2. The theory of continental drift was supported by what kind of evidence?
a) matching fossils on different continents
b) shapes of continents appear to fit like a jigsaw puzzle
c) matching rocks and mountain ranges on different continents
d) all of the above
e) there was no known mechanism capable of moving continents

3. Fossils of marine organisms found at high elevation in mountain ranges are believe to suggest:
a) sea level was once higher than the mountains.
b) the rock in these mountains were once below sea level and were later uplifted.
c) the fossils were organisms that live in mountain lakes.
d) mountains only form in ocean basins.

4. A fault-bounded crustal block that has been accreted onto a continent is called a:
a) shield.
b) terrane.
c) mountain belt.
d) craton.

5. At what type of plate boundary are most continental mountains formed?
a) divergent boundary
b) passive margin
c) convergent boundary
d) transform boundary

6. Which of these describes the current theory of plate tectonics?
a) it combines elements of continental drift and seafloor spreading.
b) it helps explain the location of volcanoes and earthquakes.
c) it suggests that the lithosphere is divided into pieces, called plates.
d) denser ocean crust sinks below less-dense continental crust along subduction zones.
e) all of the above.

7. A mid-ocean ridge is an example of what type of plate boundary?
a) convergent zone
b) divergent zone
c) transform zone
d) subduction zone

8. The alignment of iron-rich minerals in lava flows may show that:
a) the Earth's magnetic poles may have moved.
b) the Earth's magnetic poles have switched alignment many times in the past.
c) lava preserves the orientation of global magnetism as it cools below the Curie point.
d) the continents may have moved over time.
e) all of the above.

9. Which feature is NOT an example of plate tectonic convergence region on the Earth today?
a) the Himalayas
b) Iceland on the Mid-Atlantic Ridge
c) Japan
d) the Andes
e) The Aleutian Island Chain

10. Almost all "deep-focus" earthquake occur along or near what type of plate boundary?
a) convergent
b) passive
c) transform
d) divergent

Extra Credit: Which type of plate boundary is in the coastal California region?
a) passive
b) divergent
c) convergent
d) transform