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Plate Tectonics Unit Test Study Guide
Plate Tectonics Unit Test Study Guide

... 2. The Richter scale measures rock movement on a scale of 1-10 3. Mercalli Scale measures the damage done during an earthquake 4. Occur at convergent, divergent and transform boundaries ...
Plate Project SCRIPT
Plate Project SCRIPT

... new oceanic crust is formed in the gap between two diverging plates. Plate area is increased as the plates move apart. 2. Plate movement takes place laterally away from the plate boundary, which is normally marked by a rise or a ridge. The ridge or rise may be offset by a transform fault. 3. Present ...
Physiography of the Seafloor
Physiography of the Seafloor

... • Troughs generally perpendicular to mid ocean ridge (MOR) segments they offset • 10-100 km wide, up to 3500 km long • Up to a few km relief ...
MS1_PNT_Geologyppt_V01
MS1_PNT_Geologyppt_V01

... Caused when 2 plates collide and one plate is pushed under the other one and pulls the sea bottom with it. The deepest trench is the Marianas trench with a depth of 11,022 meters, or almost 7 ...
Chapter 9 Class Notes
Chapter 9 Class Notes

... The theory of plate tectonics explains how plates and their continents move.  Wegener’s theory and sea floor maps were used to develop the theory of plate tectonics.  Along spreading centers in the sea floor, melted rock rises through cracks, cools, and forms new crust that builds up mid-oce ...
Study Guide for Plate Tectonics Final
Study Guide for Plate Tectonics Final

... 4. What is a divergent plate boundary? How do the plates move? What happens to the crust at this boundary? What features are formed at a divergent plate boundary? Know the difference between ocean and land divergent boundaries. ...
Plate Tectonics Lecture Notes Page
Plate Tectonics Lecture Notes Page

... plates simply slide past one another. As one can observe, the mid-ocean ridge is not a continuous straight line, but instead consists of short segments offset from one another. Connecting these offset segments are ...
Sea Floor Spreading – 1956-1963
Sea Floor Spreading – 1956-1963

... Marine magnetic anomalies are not uniform and thickness not proportional to anomaly age (but he doesn’t know about magnetic “skewness” due to interaction with earth’s field) ...
Earth and Space Science Quarterly Pre/Post Assessment
Earth and Space Science Quarterly Pre/Post Assessment

... Use this map to answer question 11 and 12. The map below shows some of the major tectonic plates on Earth. ...
PT Dir Rdg
PT Dir Rdg

... 20. A narrow area that forms where the plates at a divergent boundary separate is called a __________________. 21. Where are most divergent boundaries located? 22. When oceanic lithosphere collides with continental lithosphere, the oceanic lithosphere is more dense than the continental lithosphere, ...
What is the crack in the ocean floor through which magma rises
What is the crack in the ocean floor through which magma rises

... Eurasian plate at the Mid-Atlantic Ridge. d. island arc of Japan. ...
Plate Tectonics - Travelling across time
Plate Tectonics - Travelling across time

... some volcanos are always active, while others only erupt once every thousands of years? Believe it or not, many scientists believe that earthquakes, volcanoes, and even tsunamis are all related to a favorite scientific theory: plate tectonics. About fiy years ago, many scientists came up with an id ...
Plate Tectonic Objectives
Plate Tectonic Objectives

... 8. Define the theory of plate tectonics and understand how this theory differs from Wegener's continental drift hypothesis and the process of seafloor spreading. 9. Know the three main plate boundaries and the features that are found at each. 10. Know and understand why earthquakes, volcanoes, and m ...
Geology study cards
Geology study cards

... oxygen and silicon. ...
Digestive System Study Guide
Digestive System Study Guide

... the I____ C_____ is S_______ because of the immense amount of pressure that it is under. ...
The Theory of Tectonic Plates
The Theory of Tectonic Plates

... 2. The speed a tectonic plate moves per year is best measured in centimeters per year.! ...
Fold Mountains
Fold Mountains

... Plate Boundaries http://www.gatm.org.uk/?p=139 ...
Continental Drift
Continental Drift

... the asthenosphere) plus the crust (both continental and oceanic).  The lithosphere is solid and makes up the plates.  The asthenosphere is the part of the mantle that is ...
Plate Tectonics, Isostasy, and Paleogeography
Plate Tectonics, Isostasy, and Paleogeography

... divided into about 30 lithospheric or techtonic plates –13 large and 17 smaller – which move and interact with one another  Most plates include both continental crust and oceanic crust  These plates move very slowly over a semi-molten or plastic asthenosphere, only 2 to 5 centimeters (1-2 inches) ...
DATASHEETforHANDOUTBWITHANSWERS
DATASHEETforHANDOUTBWITHANSWERS

... 1. What happens when a tectonic plate gets subducted? The lighter less dense plate goes over the top; the colder denser plate bends and slides under and plunges deeper into the mantle. 2. Name a specific location on Earth where this kind of boundary activity takes place. Andes Mountains in South Ame ...
Earth`s Interior and Plate Tectonics
Earth`s Interior and Plate Tectonics

... Divergent – the crust separates because the tectonic plates are pulling away from each other exposing new lava that cools to rock Convergent – plates are being pushed together so the boundaries collide, (earthquakes) – Forming mountains, sub-duction zones & volcanoes Transform Fault, (earthquake zon ...
chapter 11 Dynamic Planet
chapter 11 Dynamic Planet

... these ranges, including slices of oceanic crust - ophiolites Seismically active - Himalayas are the world’s highest and youngest mountains ...
Earth`s Interior
Earth`s Interior

... order (oldest to youngest), but without absolute ages. We use a number of principles and laws to do this: • Law of Original Horizontality – Sedimentary units and lava flows are deposited horizontally. • Law of Superposition – the layer below is older ...
Plate Tectonics
Plate Tectonics

... a) Oceanic-Continental Convergence When an oceanic plate pushes into and subducts under a continental plate, the overriding continental plate is lifted up and a mountain range is created. Even though the oceanic plate as a whole sinks smoothly and continuously into the subduction trench, the deepest ...
CH. 15 CONCEPT CHECKS
CH. 15 CONCEPT CHECKS

... 5. How did Wegener account for the existence of glaciers in the southern landmasses at a time when areas in North America, Europe, and Asia supported lush tropical swamps? ...
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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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