Name_____________________			Student ID #___________________
Geo 105 -- Winter98 -- "MidTerm Test"
Instructions: First, write your name & ID # above. Mark all your answers on this test sheet and return it. No books, notes, or talking during the test. For the multiple choice questions, choose the one best answer and clearly mark it. For the short answer questions, think first, then write your response within the space provided. NOTE: Multiple choice questions (3 pts each) on front side, short answer questions (5 pts each) on BACK side. Good luck!
________________________________________________________________________

1. Science seeks to find:
(a) the most complicated answer to nature's puzzles; 
(b) hypotheses that can only be expressed with complex mathematics; 
(c) the most beautiful explanation that can not be tested by experiments; 
(d) the simplest explanation that is consistent with the most observations.

2. In the early days of the continental drift hypothesis, landbridges were:
(a) a key aspect of an alternative hypothesis to explain some plant and animal fossils found in the southern continents; 
(b) the key observation used to prove that glaciers flowed from Africa to South America; 
(c) built by paleontologists to test evolution theory; 
(d) thought to be mid-ocean ridges that connected North and South America.

3. Subduction zones are:
(a) the same as fracture zones; 
(b) plate boundaries where ocean crust is created; 
(c) plate boundaries where ocean crust returns to the mantle; 
(d) places in the middle of plates where hot spot volcanos go underground.

4. The type of volcanos with the most explosive eruptions usually occur:
(a) at mid-ocean ridges; 
(b) at subduction zones; 
(c) at transform faults; 
(d) at hotspots.

5. Earthquake damage is mostly due to: 
(a) shaking caused by seismic waves; 
(b) shaking caused by landslides; 
(c) houses falling into holes made by tsunami waves; 
(d) earthquakes that occur at mid-ocean ridges.

Two Short Answer Questions:

6. Recall that we divided the scientific development of plate tectonics into three stages. To go from the sea-floor spreading stage to plate tectonics, what were the key changes in the explanation of ocean crust creation?




















7. Recall our discussions of Hawaii, the San Francisco Bay area of California, and Michigan. Which region has the greatest earthquake hazards? Defend your choice.














---------------------------------------- end --------------------------------------