ES - Chap. 11-Plate Tectonics

____ is the process by which new ocean floor is created and causes the continents to “drift”.

____ are found over the rising part of a lower mantle convection cell.

Divergent boundaries found on land are known as:

Mountain ranges are most often formed at ____ boundaries.

What type of landform is formed by a mantle plume hot spot?

A rising mantle plume in the mantle may divide the lithosphere above and form a:

One of the main pieces of evidence for sea-floor spreading is:

What question(s) did an understanding of plate tectonics allow us to answer?

Which scientist’s ideas about sea-floor spreading surged the inquiry on the topic of plate tectonics?

____ is the name given to the ancient supercontinent composed of earlier forms of today’s continents.

What happens when a continental plate and an oceanic plate collide?

Convection cells in the ____ are responsible for the movement of tectonic plates.

What was Harry Hess’ idea about the movement of continents?

If 245 million years ago, the modern day continents were a giant “supercontinent”, what was the rest of Earth’s surface

What type of rock is oceanic crust primarily made of?

The sinking of one lithospheric plate under another lithospheric plate is known as:

____ was the scientist who put forth the idea of continental drift.

If the Pacific plate is moving at 8 cm/yr, how many years would it take to move 8 kilometers?

Large pieces of Earth’s crust that move over the asthenosphere are known as:

Why was Wegener’s hypothesis of a supercontinent that broke apart rejected by other scientists at the time?

What are the two types of lithospheric plates?

The best way to detect transform faults is by the ____ they cause.

Older lithospheric plates are cooler plates, and therefore ____ than young plates

How did Alfred Wegener explain that evidence of glaciers exists in areas near the equator?

The idea that continents move slowly on Earth’s surface is known as:

What type of rock is continental crust primarily made of?

The valleys that form in the ocean floor when two oceanic plates collide are called:

A ____ boundary occurs where two lithospheric plates are sliding past each other

Wegener’s evidence for continental drift included all of the following EXCEPT:

A ____ boundary occurs where two plates are moving apart from each other.

____ is the distinctive lava found at mid-ocean ridges.