Exam 3: Plate Tectonics

Mantle convection involves the asthenosphere moving upward due to its lower:

Which location on this figure from the Investigation is located on the abyssal plain?

What is associated with reversed magnetic polarity?

Which of the following features is present on the seafloor off the Pacific Northwest?

Broad symmetrical ridges that cross ocean basins are called:

A divergent plate boundary is most likely associated with an):

Which of the following best represents the sequence by which a continent splits apart?

Intense geologic activity occurs at plate:

As two oceanic plates diverge at mid-ocean ridges, melting of the rising mantle occurs due to:

This figure shows plate boundaries south of Alaska. Which location is on a transform boundary?

Convergence of two ocean plates forms an ocean-ocean:

Island chains and seamounts cross parts of the ocean floor. These oceanic islands and associated seamounts are:

Mid-ocean ridges are higher than surrounding oceanic crust primarily because:

On this map, identify which letter is over the Pacific Ocean.

On the accompanying figure, what type of feature is located in the area of number 2?

On this map of the South Atlantic, which letter is on a site of seafloor spreading?

What causes magnetic stripes on the seafloor, such as those shown here?

Why does the Tibetan Plateau, shown in this figure, have a high elevation?

What is the underlying geologic explanation for why western South America is so different from eastern South America?

What types of plate boundaries are shown in this figure?