Duplicate of Plate Tectonics

Abraham Ortelius thought what kind of activities caused the continents to move

A region where two tectonic plates are moving apart.

What formations run along the ocean floor around the Earth, much like seams on a baseball?

An imaginary line on a map that shows points that have the same age

The theory that explains how new oceanic crust is formed at ridges and destroyed at trenches?

Along with ocean ridges, scientists discovered ___ which are narrow, underwater depressions in the seafloor

When continental crust begins to separate at a divergent boundary, it forms...

A Dutch cartographer who noticed the apparent fit of the contients

Wegner discovered coal on Antarctica, what does that mean?

A region where two plates slide horizontally past each other

How did Wegner use fossils of plants & animals found on different continents?

As the magma in the mantle cools it ____

WHY did scientists finally accept Alfred Wegner's hypothesis of continental drift?

Short-term changes in the Earth's magnetic field are called

What is the deepest ocean trench we have discovered?

A process where the dense subducting plate pulls the trailing slab into the subduction zone

What is the main factor that determines which plate will subduct (go under the other)?

Transform boundaries are characterized by what two features?

What is the ancient super continent made up of all the continents that began to break apart 200 mya

Huge pieces of the crust and ridged upper mantle that fit together at their edges to cover the Earth's surface

As the magma in the mantle is heated it ____

The surface of the Earth has...

The study of the history of Earth's magnetic field

The magnetic field that is opposite to the present magnetic field has ___ polarity

The thickness of the ocean floor ___ with distance from an ocean ridge

A German meteorologist who presented his hypothesis on continental movement

A long, narrow depression that is formed from stretched crust

Regions with normal and reverse polarity form stripes on the ocean floor that run ___ to ocean ridges

___ is the transfer of thermal energy by the movement of heated material from one place to another

A process when two plates collide and the denser plate descends below the other

Earth's present magnetic field is called ___ polarity

In what decade did scientists finally begin to accept Wegner's hypothesis of continental drift?

Continental-continental convergent boundaries create what topographical feature?

Why was Alfred Wegner's theory rejected?

_____ ocean crust is found along deep-sea trenches

A device that detects small changes in magnetic field

___ ocean floor crust is near ocean ridges

A region where two tectonic plates are moving towards each other.

How is a magnetometer used to detect changes in magnetic field of ocean floor?

A process that happens when the flow in the outer core of the Earth changes, and Earth's magnetic field changes

At a oceanic-continental convergent boundary, which plate will subduct?

What are responsible for transferring thermal energy from Earth's interior to its exterior?

What chapter is this test over?

At an oceanic-oceanic convergent boundary, what is located parallel to the trench formed?

The process of subduction creates an ocean ____.

Long-term changes in the Earth's magnetic field are called

Wegner was able to match rock layers from Greenland and Europe to _____ to use as evidence for continental drift

A ___ happens when the flow in the outer core changes and Earth's magnetic field changes directions

What technology do scientists use to measure water depth and the topography of the ocean floor?

When did Pangea begin to break apart?

When the weight of the uplifted ridge is though to push the ocean plate towards the trench

What part of the Earth is responsible for moving tectonic plates?

The hypothesis that Earth's continents were joined as a single landmass, that broke apart and slowly moved