Chapter 17 - Plate Techtonics

When two oceanic plates are spreading apart at a divergent boundary it creates a what?

What kind of feature forms along a continental-continental boundary?

Generally, what is the age of oceanic crust?

Transform boundaries are most likely to produce what phenomenon?

Subduction zones in the ocean can create which features?

What type of boundary is shown?

How fast do plates move relative to each other?

Why do oceanic plates always subduct under continental plates?

What was Wegner's hypothesis called?

Continental plates are mostly made of

The Great Rift Valley in Africa and the Mid-Ocean Ridge were all created by this boundary:

What type of boundary is shown?

Which layer has convection currents?

What type of plate boundary would cause mountains to form?

A magnetic reversal happens when

Ridge push and slab pull are two of the processes that move tectonic plates over the surface of the earth.

What are two types of crust?

As you move away from a oceanic ridge, the rock gets

A mid-ocean ridge occurs at a ________ plate boundary.

Granite is less dense than basalt

What kind of currents develop in the mantle transferring thermal energy from the Earth's interior to its exterior?

Oceanic plates are mostly made of

In 1912, who proposed the hypothesis about continental movement to the scientific community?

What is the name of the plate boundary that slides past each other?

Which is a convergent boundary that does not have a subduction zone?

The Himalayas in Asia are an example of what type of plate boundary?

Earthquakes and volcanoes are most likely found in which locations?

The theory of seafloor spreading was introduced in the 1960s by who?

When one plate slides underneath another, it _________ and the plate _________.

Which suggested to early cartographers that the continents were once joined?