Exam 2: Earth Structure and Plate Tectonics

The crust and the mantle are divided into the following layers in order of increasing depth:

Volcanic activity is common at transform plate boundaries.

The present oceans have been created during the last ________.

When talking about plate tectonics, which of the Earth's layers comprises the plates?

Higher seafloor heat flow values are found ________.

The Hawaiian Islands are ________.

Oceanic-type crust is more dense than continental-type crust.

The oceans' oldest sediments are found ________.

Subduction explains the fact that the oldest oceanic crust is close to 200 million years old, compared to the oldest continental rocks that are ________.

Which layer is believed to behave most like a liquid?

Which of Earth's layers contains the greatest volume of material?

Which method is being used to investigate the structure of the mantle?

The motion between the two sides of a transform fault is greatest ________.

Magnetic stripes on the seafloor are created at ________.

What is the approximate length of the mid-ocean ridge system that extends around the globe through all of the major ocean basins?

Plates move horizontally past each other along ________.

Which layer of the Earth contains the greatest mass?

The taller a mountain is, the deeper its root will extend into the asthenosphere.

Spreading at mid-ocean ridges tends to occur in increments rather than continuously.

California is an example of a passive continental margin.