Explain the difference between the tectonic activity experienced by cratons during the
Precambrian and after the Precambrian. What will be an ideal response?
During the Precambrian, the shield areas were tectonically active with several episodes of
deformation accompanied by metamorphism, igneous activity, and mountain building. However,
the cratons have experienced remarkably little deformation since the Precambrian.
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The North American plate is moving ________.
A. east B. north C. west D. south E. nowhere, it's fixed
The melting of Arctic ice has ____
A) ?forced ships to pass through the Panama canal B) ?made it possible for ships to take different trade routes C) ?raised sea levels resulting in closure of major ports D) ?had no effect on the shipping industry
After lava cools below the ________ point atoms in iron-bearing minerals become magnetized in the direction of Earth's magnetic field at that time and place.
A. Maxwell B. critical C. solidus D. triple E. Curie
High-relief hummocky topography develops where:
a. the glacier was sliding on its bed b. a thick layer of sediment accumulates on top of a stagnant glacier c. the glacier is moving over easily erodible sediment d. the glacier is moving down a steep valley