Plate Tectonics

Features found at divergent boundaries include

______ is defined as the study of the history of earth's magnetic field.

One of the driving forces of tectonic plates are related to convection currents in Earth's ___?

Many early mapmakers thought Earth's continents had moved based on?

The magnetic pattern of ocean-floor rocks on one side of an ocean ridge is ____.

Each cycle of spreading and intrusion of magma during seafloor spreading results in __.

The transfer of thermal energy by the movement of warmed matter is called convection

Place where plates move apart are

____ is a fossil fern that helped support Wegener's hypothesis of continental drift?

Crust is neither destroyed nor formed along which of the following boundaries?

Isochron maps of the seafloor indicate that ocean crust is

Many early mapmakers thought Earth's continents had moved based on

Subduction results in the formation of

Continental-continental plate collisions produce

The driving forces of tectonic plates are related to convection currents in Earth's

A vast, underwater mountain chain forms at a(n) ____.

A narrow, elongated depression in the seafloor is called a(n) _____.

The youngest part of the ocean floor is found ____.

A map line connecting points that have the same age is a(n)

The downward part of a convection current causes a sinking force that ____.

Wegner's hypothesis __ stated that Earth's continents had once been joined as a single landmass

At an oceanic-oceanic convergent boundary, ____.

Compared to ocean crust near deep-sea trenches, crust near ocean ridges is

Earth's continents were once joined in a single land mass called

Wegener's hypothesis of continental drift was rejected b/c he couldn't explain the movement.

Continental-continental plate collisions produce ____.

As new seafloor moves from an ocean ridge, the floor cools and is less dense than what's below