Chapter 17 Plate Tectonics Review
Subduction
Occurs when one tectonic plates descends beneath another.
Transform
Crust is neither destroyed nor formed along which of the following boundaries
Transform Boundaries
Crust is neither destroyed nor formed along which of the following boundaries
Theory of Plate Tectonics
States that Earth's Crust and rigid upper mantle are broken into enormous slabs called plated that move slowly over Earth's surface.
ocean ridges
Features found at divergent boundaries include
Magnetic Reversal
A change in the earths magnetic field
rift Valley
A long narrow fault bounded continental depression
Isochron
A map line connecting points that have the same age
Ridge Push
A process whereby the weight of an uplift ocean ridge pushes an oceanic plate toward a subduction zone.
Transform Boundaries
Are places where plates slide horizontally past each other
Plate Boundaries Zone
Broad belts in which boundaries are not will defined and the effects of plates in teraction & unclear.
younger
Compared to ocean crust near deep-sea trenches, crust ocean ridges is
Wegner couldn't explain why or how
Continental Drift was not widely accepted when it first proposed because
Very Tall mountains
Continental-Continental plate collision produce
Magnetometer
Detects small change in Earth's magnetic field
new ocean crust
Each cycle of spreading and intrusion of magma during seafloor results in
Pangaea
Earth's continents were once joined as a single landmass
Sea floor spreading
Explains how new ocean crust is created at ocean ridges and destroyed in deep sea trenches
youngest near ocean ridges
Isochron maps of the seafloor indicate that ocean crust is
matching coastlines
Many early map makers thought that earth's contonets had moves based on
Divergent Boundaries
Places where plates move apart
Convection Boundaries
Plates come together at
Hotspots
Regions of Earthquakes and volcanic activity which do not occur along plate boundaries.
a deep-sea trench
Subduction results in the formation of
a mirror image of that of the other side
The magnetic pattern of ocean floor rocks on one side of an ocean ridge is
Mid Atlantic Ridge
The most famous example of a divergent boundary.
Paleomagnetism
The study of Earth's magnetic record
Convection
The transfer of thermal energy by the movement of heated matter.
Continental Drift
Wegener's hypothesis of __________ stated that earth's continents had once been joined as a single landmass.
Volcanos
What is a landform of a Hotspot
Volcanos
What is a landform of a continent to continent convergent boundaries.
Island Arc
What is a landform of a ocean to ocean convergent boundaries.
Ocean Ridge, Rift Vally
What is the landforms of a divergent boundaries.
Convergent Boundaries
Where crust is destroyed as one plate dives under another.
Divergent Boundares
Where crust is generated as the plates pull away from each other.
Transform Boundaries
Where crust is neither produced nor destroyed as the plates slide horizontally past each other.
The side thats more dense
Which side of a ocean to ocean goes under the other, during Convection Boundaries