What is the driving mechanism for plate tectonics?
A)heat deep within Earth
B)tidal forces caused by the moon
C)volcanoes and earthquakes at plate boundaries
D)gravity and magnetism acting on continents
E)strong ocean currents and global winds
Question 2The principle of lateral continuity says that if a fault occurs in a sequence of sedimentary rocks, the fault is older than the rocks.
Indicate whether the statement is true or false
Question 3A thrust fault ____.
A)is the opposite of a dip-slip fault
B)is a special case of a reverse fault where the dip is greater than 45o
C)is a special case of a reverse fault where the dip is less than 45o
D)is caused by shear stress
E)can be right-lateral or left-lateral
Question 4The seafloor spreading hypothesis indicates what as the primary cause of continental movement?
A)volcanism in the ocean crust
B)convergence of tectonic plates
C)the formation and destruction of ocean basins
D)the convection of mantle heat
E)the decay of radioactive isotopes
Question 5Fossils cannot usually be dated directly because they are not composed of minerals that naturally contain radioactive isotopes.
Indicate whether the statement is true or false
Question 6Faults that penetrate the surface may show a ____.
A)fault scarp
B)graben
C)horst
D)fault block
E)fault breccia
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