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REVIEW Use the following terms to answer the
REVIEW Use the following terms to answer the

... 1. current in Earth’s mantle that transfers heat in Earth’s interior and is the driving force for plate tectonics. 2. a large section of Earth’s oceanic or continental crust and rigid upper mantle that moves around on the asthenosphere 3. theory that Earth’s crust and upper mantle are broken into pl ...
JEOPARDY
JEOPARDY

... valleys that form in the ocean floor when two oceanic plates collide are called… What are? ...
Plate Boundaries - Valhalla High School
Plate Boundaries - Valhalla High School

... • Alfred Wegner, 1915 • The continents were once a super-continent called Pangea • the continents are plowing through the ocean floors---most people didn’t believe this ...
The stability of the continents and the tendency for old oceanic
The stability of the continents and the tendency for old oceanic

... (c)
Calculate
the
average
density
of
the
oceanic
plate
from
the
two
densities
you
determined
in
 part
(b),
bearing
in
mind
the
relative
thicknesses
of
the
crust
and
lithospheric
mantle.

 2.
Now
calculate
the
average
density
of
a
continental
plate
by
repeating
the
procedure
in
part
(1).

 3.
Thirdly ...
Opposition to Continental Drift
Opposition to Continental Drift

... By contrast, the relatively cool and rigid lithosphere tends to respond to forces acting on it by bending or breaking but not flowing. Because of these differences, Earth’s rigid outer shell is effectively detached from the asthenosphere, which allows these layers to move independently. ...
PANGEA
PANGEA

... F =ÿAt convergent boundaries, the plates are actually moving toward each other, causing a collision. ÿ2When there is a continent on both sides of the plates, the collision causes the crust to crumble, fold, tilt, or lift, forming mountains. 23The Himalayan Mountains formed along a convergent boundar ...
Document
Document

... of continents, called cratons ...
Tectonics of the Java Trench – Sumatra, Philippines
Tectonics of the Java Trench – Sumatra, Philippines

... basin along the northern margin of the trench, a forearc high, and the trench itself. Fault plane solutions and GPS measurements reveal that the Australian Plate is orthogonally subducting below the Sunda Plate at 67 mm/yr N11oE ± 4o relative to the Java Trench, with a small degree of left-lateral m ...
Plate Tectonics - for Jack L. Pierce
Plate Tectonics - for Jack L. Pierce

... nowhere else, supports the continental drift hypothesis. 4. What two aspects of Wegener’s continental drift hypotheses were objectionable to most Earth scientists? 5. What major ocean floor feature was discovered by oceanographers following World War II? 6. Describe how Fred Vine and D.H. Matthews r ...
Lab Quiz 1 Review Sheet
Lab Quiz 1 Review Sheet

...  know that salt water is denser than fresh water and that the density of pure water is 1 g/cm3  be able to explain (in general) why boats float Plate Tectonics and Ocean Contour Labs  be able to name the Four (or five if you include the Southern ocean) Oceans of the world  know that the United S ...
Sea-Floor Spreading
Sea-Floor Spreading

... of cool hard rocks. Most of them have both continental and (9) ...
Chapter 23 Test Review Notes
Chapter 23 Test Review Notes

... Compare the type of information obtained with a precision depth recorder with that obtained by a gravity corer. A precision depth recorder produces a continuous record of seafloor depth under the ship as it moves over an area. A gravity corer provides information about the seafloor at one point only ...
Plate Tectonics
Plate Tectonics

... • The data on the ages of seafloor sediment confirmed what the seafloor spreading hypothesis predicted. ...
Problem Set #1 due Mon, 2/09/09 Please answer the following
Problem Set #1 due Mon, 2/09/09 Please answer the following

... 1. Discuss the 4 main lines of evidence that Alfred Wegener used to support his theory of continental drift. 2. What is the difference between the theory of plate tectonics and the theory of continental drift? 3. What is the difference between the lithosphere and the asthenosphere? 4. Explain how a ...
Lesson 4 - davis.k12.ut.us
Lesson 4 - davis.k12.ut.us

... Mantle Create a diagram to illustrate convection currents in the mantle. Use Convection Figure 21 to help you. Use with pages 486–488. ...
Plate_tectonics[1]
Plate_tectonics[1]

... a subduction zone • NO SUBDUCTION • Mountain building takes place • Example: Himalayas ...
Plate tectonics and the distribution of Earthquakes
Plate tectonics and the distribution of Earthquakes

... Plate tectonics and the distribution of Earthquakes| sample answer Q: ‘Explain, with reference to examples that you have studied, how the theory of plate tectonics helps to explain the distribution of earthquakes around the world’ (2012 Q1 B.) The theory of plate tectonics states that the crust (lit ...
Respect the teacher and your peers
Respect the teacher and your peers

... – Class connects are a time to learn ...
Chapter 2
Chapter 2

... A small addition of these volatile substances can lower the melting point of rock by several hundred degrees Celsius. ...
Plate Tectonics - Issaquah Connect
Plate Tectonics - Issaquah Connect

... Boundaries are where the plates are sliding past each other. (Like two trains going past each other, I know it’s a stretch). ...
Assignment 5. Locating plate boundaries on Trafalmador.
Assignment 5. Locating plate boundaries on Trafalmador.

... •Oceanic ridges display a linear pattern of earthquakes, all of which have relatively shallow foci. •If deep or intermediate earthquakes lie parallel to the band of shallow earthquakes, it is not a ridge, it is a trench. •Transform faults displace the oceanic ridge and these faults are also characte ...
Assignment 2. Locating plate boundaries on Trafalmador.
Assignment 2. Locating plate boundaries on Trafalmador.

... •Oceanic ridges display a linear pattern of earthquakes, all of which have relatively shallow foci. •If deep or intermediate earthquakes lie parallel to the band of shallow earthquakes, it is not a ridge, it is a trench. •Transform faults displace the oceanic ridge and these faults are also characte ...
The Theory of Plate Tectonics
The Theory of Plate Tectonics

... Plate Tectonics: the theory that states that pieces of Earth’s lithosphere are in slow, constant motion driven by the convection currents in the mantle.  The theory of plate tectonics explains the formation, movement, and subduction of Earth’s plates.  The plates are carried along like ice is carr ...
ERSC 1P92 Assignment 2. Locating plate boundaries on
ERSC 1P92 Assignment 2. Locating plate boundaries on

... •Oceanic ridges display a linear pattern of earthquakes, all of which have relatively shallow foci. •If deep or intermediate earthquakes lie parallel to the band of shallow earthquakes, it is not a ridge, it is a trench. •Transform faults displace the oceanic ridge and these faults are also characte ...
ppt - Discover Earth Science
ppt - Discover Earth Science

... the oceanic crust will always subduct underneath the continental • Volcanoes always seem to form at subduction boundaries – If two oceanic plates converge, volcanic islands will form (ex - Aleutian Islands in Alaska) – If one plate is continental and the other oceanic, the volcanoes will form along ...
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Oceanic trench



The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few mm to over ten cm per year. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. Trenches are generally parallel to a volcanic island arc, and about 200 km (120 mi) from a volcanic arc. Oceanic trenches typically extend 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic floor. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench, at a depth of 11,034 m (36,201 ft) below sea level. Oceanic lithosphere moves into trenches at a global rate of about 3 km2/yr.
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