Duplicate of Earth/Space Science Chapter 17 Test Review

According the theory of plate tectonics, plates interact by deflecting/moving away/moving horizontally

A magnetometer detects small changes in Earth's magnetic field.

Earth's continents were once joined as a single landmass called Pangaea.

Each cycle of spreading and intrustion of magma during seafloor spreading results in ____.

The theory of seafloor spreading explains how new ocean crust is created at ocean ridges and destroyed in trenches

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

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

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

Slab pull is a process that occurs at convergent boundaries.

Continental drift was not widely accepted when it was first proposed because ___.

A change in Earth's magnetic field is called a magnetic reversal

Places where plates move apart are convergent boundaries.

Scientists rejected Wegner's hypothesis of continental drift because he could not explain how or why continents move

Convection currents transfer thermal energy ___.

The study of Earth's magnetic record is known as paleomagnetism.

Features found at divergent boundaries include ___.

The youngest part of the ocean floor is found ___.

Plates come together at divergent boundaries

Some early mapmakers thought that the coastline of South America matched the coastline of Asia?

Subduction results in the formation of ___.

The weight of a subducting plate helps pull the lithosphere into a subduction zone in a process called slab pull.

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

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

___ is a fossil fern that helped support Wegener's hypothesis of continental drift.

The rising part of a convection current causes upward/lateral forces that lift/split the lithosphere at divergent bound

The transfer of thermal energy by the movement of heated matter is conduction.

The theory of plate tectonics states that the crust/upper mantle are broken into slabs called plates that move slowly.

If two continental plates converge, a subduction zone forms.

Divergent occurs when one tectonic plate descends beneath another.

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

As new seafloor moves away from an ocean ridge, the seafloor cools and becomes less dense than the material beneath it.

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

Continental-continental plate collisions produce ___.

At an oceanic-oceanic convergent boundary, ___.

A long narrow fault-bounded, continental depression is a rift valley

Wegener's hypothesis of continental drift stated that Earth's continents had once been joined as a single landmass

A map line connecting points that have the same age is a sameochron

Ridge push is a process where the weight of an uplifted ocean ridge pushes an oceanic plate toward a subduction zone

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

Isochron maps of the seafloor indicate that ocean crust is ___.