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Freshwater reptile Mesosaurus
Freshwater reptile Mesosaurus

... Evidence that supported Wegener’s Theory 1. Change in Climate –Example: Glaciers in Africa Glacial striations, the parallel "scrape" marks on rocks caused by moving glaciers, have been found on rocks in South America, Africa and Australia and are of similar orientation to striations found on Antarc ...
Plate Tectonics and Western North America
Plate Tectonics and Western North America

... Plate Tectonics and Western North America ...
Bellringer: Oceans are not just places… The Water Planet
Bellringer: Oceans are not just places… The Water Planet

...  Color code the tectonic plate boundaries  Label where you can find the following:  Mid-Atlantic Ridge  Indian Ridge ...
File
File

... b. Plate continues to move, volcano goes with it and becomes inactive, new one forms c. Hawaii was formed this way---by a hot spot. 3. Mid Ocean Ridges—forms from divergent plates a. Volcanoes on these ridges contain pillow lava (lava rapidly cooled by water) ...
Earth Materials – Progress Test 4
Earth Materials – Progress Test 4

... (d) Suggest one natural process that can release carbon dioxide back into the atmosphere. (2 marks) (e) Suggest one process that returns carbon dioxide to the atmosphere that results from the activities of man. (2 marks) ...
Interactive Earth Website Activity-
Interactive Earth Website Activity-

... 1. There are ____________ major tectonic plates. There are 2 main types of tectonic plates. They are __________________________ and ____________________________. 2. _____________________________plates are thicker and usually __________________ than oceanic plates. 3. The names of the plates usually ...
File
File

... ______2. Plates are composed of the ______. a. crust and part of the upper mantle b. lithosphere and asthenosphere ______3. The lithosphere is composed of the ______. a. plates and seafloor b. crust and upper mantle ______4. Plates float on the ______. a. asthenosphere b. lithosphere ______5. Plates ...
Regents Earth Science – Unit 11: The Dynamic Crust
Regents Earth Science – Unit 11: The Dynamic Crust

... Earth's interior is hot - heat must escape heat is transferred to the surface by convection ...
plate tectonics - Hobbs High School
plate tectonics - Hobbs High School

... Divergent Boundaries  Oceanic Ridges and Seafloor Spreading • Oceanic ridges are continuous elevated zones on the floor of all major ocean basins. The rifts or spreading centers at the crest of ridges represent divergent plate boundaries. • Rift valleys are deep faulted structures found along the a ...
History of Earth Vocabulary
History of Earth Vocabulary

... The mantle is the largest layer of the Earth’s interior below the crust. The mantle is where convection takes place. The crust is the outermost layer of the Earth. The lithosphere is the thin outer shell of Earth consisting of the crust and the rigid upper mantle. Most of the Earth’s plate movement ...
FCAT 2.0 Science Test Item Specifications Grade 8
FCAT 2.0 Science Test Item Specifications Grade 8

... Explore the scientific theory of plate tectonics by describing how the movement of Earth’s crustal plates causes both slow and rapid changes in Earth’s surface, including volcanic eruptions, earthquakes, and mountain building. (Also assesses SC.7.E.6.1 and SC.7.E.6.7.) ...
Blakeley Jones GEOL 1104 Review 6 – Earth`s Interior and Plate
Blakeley Jones GEOL 1104 Review 6 – Earth`s Interior and Plate

... b. two, converging, oceanic plates meeting head-on and piling up into a mid-ocean ridge c. a divergent boundary where the continental plate changes to an oceanic plate d. a deep, vertical fault along which two plates slide past one another in opposite directions 26) ________ plate boundaries have th ...
Plate slides - tclauset.org
Plate slides - tclauset.org

... Imagine a single plate, moving in one direction on Earth’s surface. One edge of the plate—the divergent boundary—moves away from things. The opposite edge—called the leading edge or convergent boundary bumps into anything in the way. ...
Plate Boundaries
Plate Boundaries

... – Mid-ocean ridges (undersea mountains and boundaries; proof that there are plates and they can move) – Trenches (proof that there are plates and that they are moving) – Island chains (Hawaii!!): can help track movement of a plate over a hotspot ...
Midterm Possible Essay Questions
Midterm Possible Essay Questions

... a. Divergent Boundary - two plates move away from one another; ex. Sea-floor spreading b. Convergent Boundary -two plates move toward each other. c. Transform Fault Boundary - two plates slide past each other; they can move in opposite directions or in the same direction. 16. What factors should eng ...
STUDY GUIDE Forces that Shape Earth
STUDY GUIDE Forces that Shape Earth

... Evidence: anything presented to support or counter a scientific theory or hypothesis Theory: an explanation of some aspect of the natural world based on knowledge that has been repeatedly confirmed through observation and experimentation Subduction: process when a plate of continental crust converge ...
E. Earthquake destruction 1. Factors that determine structural
E. Earthquake destruction 1. Factors that determine structural

... A. Most of our knowledge of Earth’s interior comes from the study of P and S earthquake waves 1. Travel times of P and S waves through Earth vary depending on the properties of the materials 2. S waves travel only through solids B. Layers defined by composition 1. Crust a. Thin, rocky outer layer b. ...
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... asthenosphere that causes the plates of the lithosphere to move. Heated material in the asthenosphere becomes less dense and rises toward the solid lithosphere, through which it cannot rise further. It therefore begins to move horizontally, dragging the lithosphere along with it and pushing forward ...
Sea Floor Spreading
Sea Floor Spreading

... example, was created as the African plate and the Arabian plate tore away from each other. Today, only the Sinai Peninsula connects the Middle East (Asia) with North Africa. Eventually, geologists predict, seafloor spreading will completely separate the two continents—and join the Red and Mediterran ...
Volcanoes, Earthquakes, Islands . . . Oh My!
Volcanoes, Earthquakes, Islands . . . Oh My!

... and builds mountains – The movement is caused by heat inside the Earth, it makes the plates move via convection currents ...
A historical overview of the work of Wegener
A historical overview of the work of Wegener

... Receives his PhD in astronomy from the University of Berlin (1904). Becomes interested in monitoring weather patterns in extreme climates like Greenland. In his spare time, follows an interest in the possibility that America and Africa had once been joined, and had subsequently drifted apart. (This ...
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... 11. What type of landform can form where two continental plates diverge? Name one actual place on Earth where this occurs. ...
Earth`s Processes Test Review
Earth`s Processes Test Review

... 4. Sketch how the following plates move. Use arrows to show direction of movement. a. Convergent b. Divergent c. Sliding (Transform) 5. Circle the correct unit (label). Tectonic plates move around 1-10 meters/centimeters/miles per year. 6. Fill in the blank with the words epicenter and focus. The __ ...
Planet Earth/Atmosphere Name Learning Targets Period _____
Planet Earth/Atmosphere Name Learning Targets Period _____

... Learning Targets Vocabulary: crust lithosphere fault epicenter Magnitude scale Stratosphere troposphere thermosphere ...
Plate Tectonics and Earth`s Interior
Plate Tectonics and Earth`s Interior

... PLATE TECTONICS AND THE EARTH’S INTERIOR Objective- To determine the relationship between the Earth’s interior and plate tectonics. Introduction- The theory of continental drift as developed by Alfred Wegner, has been expanded on is now commonly referred to plate tectonics. What Wegner could not und ...
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Plate tectonics



Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός ""pertaining to building"") is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.
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