Question What is the dominant type of bonding found in minerals?
Answer
  a) metallic bonding
  b) nuclear bonding
c) ionic bonding
  d) covalent bonding
 
       
 
Question Earthquakes recorded at depths greater than 100 km are caused by cool old brittle plates that have been taken down into the mantle by a process called "subduction"
Answer
A. True
  B. False
 
       
 
Question In plate tectonics individual plates are defined solely by composition.
Answer
  A. True
B. False
 
       
 
Question A new planet is found in a nearby solar system and you are asked to determine whether or not the planet is alive. Which of the following indicators suggest the planet is in fact alive?
Answer
  A. The planet has an electromagnetic field
  B. The planet possesses an atmosphere
  C. Initial satellite pictures show areas of high and low topography
D. All of the above
  E.None of the above
 
       
 
Question Why do we say that the Earth’s magnetic field is fossilized in the rocks of the oceanic crust?
Answer
  A. Because the magnetic minerals present in the rocks of the oceanic crust record the current magnetic field.
B. Because the magnetic minerals in the rocks of the oceanic crust record the magnetic field present at the time they cooled below their Curie temperature.
  C. Because the magnetic minerals in the rocks of the oceanic crust record the magnetic field present at the time they heat above their Curie temperature.
  D. None of above
 
       
 
Question A mineral is found and examined. The type of bonding between atoms is not known, but the mineral shows good cleavage. As an earth scientist you would predict:
Answer
a) The mineral most likely has low bond strength between atoms
  b) The bond strength can not be determined
  c) The mineral most likely has a very high bond strength between atoms
  d) None of the above
 
       
 
Question Why do we use Hot-spots as a reference to measure the movement of tectonic plates?
Answer
A. Because we suppose that they are fixed to the core and that the core does not move.
  B. Because they occur both, at oceanic crust and continental crust.
  C. Because Hot-spots form volcanic islands in the middle of the ocean (like Hawaii).
  D. None of above
 
       
 
Question The theory of continental drift is best supported by which of the following pieces of evidence?
Answer
  A. Matching ancient rock assemblages across continents
  B. Matching ancient fossils across continents
  C. Matching ancient earthquake evidence across continents
  D. A and C only
E. A and B only
  F. All of the Above
 
       
 
Question Look at Figure 2.14 from chapter 2 of your textbook. This figure represents the same plate tectonic boundary conditions found in which of the following localities around the world?
Answer
  a) East coast of North America
  b) Northwestern coast of North America
  c) West coast of South America
  d) West coast of Africa
  e) East coast of South America
  f) A and E only
g) B and C only
  h) All of the above
 
       
 
Question In general, can continental crust be subducted into the lowermost mantle?
Answer
A. No, because continental crust is of too low a density to sink into the mantle
  B. Yes, because continental crust is pulled down by the rest of the plate
  C. No, because oceanic continental crust is almost never found at a divergent boundary
  D. None of the above