CHAPTER 27
The picture below shows the plates. The Cascade mountain range, famous for its volcanoes, is found on the west coast of North America. What direction is the Juan De Fuca plate moving assuming that the North American Plate is stationary?
East
Which of the following features are most commonly associated with converging plate boundaries between two continental plates? Select one:
Fold mountain belts
Which is not associated with a plate boundary?
The Grand Canyon
The rock that makes up the ocean floor has alternating bands where the magnetic field points north, then south. What is the significance of these bands. Select one:
The bands occur symmetrically to each side of the ridge where new ocean crust is slowly being made. The Earth's magnetic field flips, and the field in the basalt points the same direction as the Earth's field when the rock formed.
How does the plate tectonic model account for the movement of continents? Select one:
The continents rest on rigid plates. The plates sit on a "mushy" layer which allows them to slide and move.
A divergent plate margin runs between Antartica and South America. What will happen as a result? Select one:
The ocean seperating them will grow wider.
Which of the following is a main function of a transform boundary? Select one:
To connect segments of a spreading center ridge
Evidence for continental drift is found in
continental shape and structure, fossils, paleomagnetic evidence, seafloor spreading
