Unit 5 Review Earth layers, Continental Drift, Seafloor Spreading, Plate Tectonics

A ____ is a sensitive device used to detect magnetic fields on the seafloor.

The crust and upper mantle make up Earth's ____.

Which of the following is not a divergent plate boundary?

If the Atlantic Ocean is widening at a rate of 3 cm per year how far (in kilometers) will it spread in a million years?

What type of material is the core of the Earth primarily composed of?

The existence of coal beds in Antarctica indicates that the continent once had ____.

Stretching stresses, basaltic lavas, and shallow earthquakes are associated with ______.

What is the name of the semi-molten layer beneath the lithosphere where convection currents occur?

The sliding of seafloor beneath a continent or island arc is known as:

The presence of the same ____ on several continents supports the hypothesis of continental drift.

While studying the ocean floor, scientists found ____ bands of magnetism.

Which of the following is the correct order of Earth's layers from the surface to the center?

The hypothesis that continents have slowly moved to their current locations is called ____.

What drives plate tectonics?

Which of the following are not associated with convergent plate boundaries?

Where do P waves travel the fastest?

Seafloor spreading occurs because ____.

Which layer of Earth is primarily responsible for generating the planet's magnetic field?

Which layer of Earth contains molten metal and is responsible for Earth’s magnetic field?

The youngest rocks on the ocean floor are located ____.