Plate Tectonics Unit Questions – Flashcards

What scientist argued forcefully for continental drift in the early part of the 20th century?

What is the name of the supercontinent during the late Paleozoic?

The northward movement of ____ into Eurasia is an example of an active, continent-continent collision

Pull-apart rift zones are generally associated with ____ plate boundary

The temperature below which magnetic material can retain a permanent magentization is the

A very long-lived magma source located deep in the mantle is called a

Linear, magnetic patterns associated with mid-ocean ridges are configured as ____ and ____ magnetized strips are parallel to the ridge

What is the energy source thought to drive the lateral motions of the Earth's lithospheric plates?

The continental drift hypothesis was rejected primarily because Alfred Wegener could not

Give 4 examples of evidence of plate tectonics

Define lithosphere

Define asthenosphere

New oceanic crust and lithosphere and formed at ____ boundaries by submarine eruptions and intrusions of ____ magma

Cooler, older, oceanic lithosphere sinks into the mantle at ____ zones along ____ plate boundaries

Deep ocean trenches are ocean features that are evidence for sinking of ____ lithosphere into the mantle at a ____ subduction zone

A transform plate boundary is characterized by a deep, vertical ____ along which two ____ slide past one another in opposite directions

The modern-day Red Sea is explained by plate tectonics theory because it is a ____ zone that may eventually open into a major ocean is Arabia and Africa continue to ____

The volcanoes and deep valleys of east Africa are related to a continental ____ along which parts of the African continent are beginning to slowly ____

Lines of ____ epicenters most effectively outline the edges of the lithospheric plates

Early results of the Deep Sea Drilling Project clearly justified the conclusion that the ocean basins are relatively ____; most ocean basin rocks and sediments are Cretaceous or younger in age

When and oceanic plate collides with a continental plate the ____ plate subducts under the ____ plaste

Deep focus earthquakes occur at ____ ____

The Pacific plate is currently moving to the (direction) ____q

Give two proposed models to explain plate movement

The deep sea drilling project found that rock samples were ____ and ____ near the ridges

Type of plate boundary where two plates move apart

Type of plate boundary where two plates come together

The motion of matter within the mantle resulting from changes in temperature which drives plate movement is called a

State composed of exotic terrains

Which plate is the largest

____ is when one plate slides below another

Ocean crust is composed of ____