Based on the present directions and rates of plate motion, what will eventually happen to North and South America? Hint
What geological period represents the oldest crust on the seafloor? Hint
What kind of seismic waves are the first to appear in an earthquake? Hint
The Red Sea is a good example of what kind of plate boundary? Hint
What major California city is on the North American Plate? Hint
What major California city is on the Pacific Plate? Hint
Is one likely to find mountains at a subduction zone? Hint
Who, in 1928, proposed the idea of fluid convection currents in the mantle as a possible mechanism for plate motion? Hint
Robert Dietz independently proposed a seafloor spreading model. How did his model differ from Harry Hess's? Hint
In the Triassic Period, 200 million years, Pangea had started to break up. What are the names of the two landmasses into which it split initially? Hint
Who was the first to propose, in the late 16th century, that the continents have not always been fixed in their present positions? Hint
What is the average rate of spreading along the Mid-Atlantic Ridge? Hint
What is the absolute velocity of the Pacific Plate at Los Angeles (118W longitude, 34N latitude)? Hint
What is the relative motion of the North American and Pacific plates at Los Angeles? Hint
The Hawaiian Islands are part of a larger chain of volcanoes and seamounts called the ____________ ___________. Hint
