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Faults are the boundaries of the tectonic plates
Faults are the boundaries of the tectonic plates

... teachers with opportunities for taking advantage of this innate desire to get students to focus on a curriculum topic.” (Roblyer& Doering, 2013, p. 96) The format of a game instead of a study guide increases the amount of participation and learning. “Gamification strategies are further extending the ...
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5a what_is_a_volcano

... plate) collide, causing the one plate to submerge under the other plate (called subduction). • In the case of oceanic-continental, a deep trench just off shore is formed. • When the thick magma, reaches the surface, a volcano is formed. • *This is what caused the typical Ring of Fire volcanoes.* ...
There was a very important event that occurred early in Earth`s
There was a very important event that occurred early in Earth`s

... (This is a long one!) There are two types of atomic bonding we talked about in class. What are they, and what is the definition of each? What makes them different from each other? a. Define cation and anion. i. A cation is a positive ion, an anion is a negative ion. I write my ‘t’ like a plus sign, ...
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Geology_Lesson1_Tectonics_stones

... their skeletal structure don’t appear to have been swimmers, and therefore couldn’t have swum from Africa to South America. 3. Identical TREE fossils are found in many now far-flung places. Ttrees are even worse swimmers than big animals, so it is hard to explain their distribution without the conti ...
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Slide 1

... In the late 1950’s a geologist named Henry Hess proposed a new hypothesis. He proposed that the valley at the center of the ridge was a crack, or rift, in the earth’s crust. Hess suggested that magma from deep inside the earth would rise through these cracks as the ocean floor moved away. The magma ...
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Earthquake Test Study Guide

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Extreme Earth - Introduction

... Surface tilting: recognition of changes in the land surface due to building pressure in the conduit. Earthquakes: generated as the magma moves up the feeder conduit to the vent. ...
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Plate Tectonics: The General Theory

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Monday - Houston ISD
Monday - Houston ISD

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... • Crustal Plates are moving Away from each other at this boundary. • Most well known is the “Mid Atlantic Ridge” • Largest Geological structure on Earth • Area of sea floor spreading – The Atlantic Ocean is getting bigger. • Can be found on land in the country of Iceland • Definitive Proof of Crusta ...
Mesozoic Plate Tectonics
Mesozoic Plate Tectonics

... At the end of the Paleozoic, there was one continent and one ocean. Then Pangaea began to break apart about 180 million years ago. The Panthalassa Ocean separated into the individual but interconnected oceans that we see today on Earth. Continental rifting and then seafloor spreading pushed Africa a ...
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Review Packet Inside the Earth - JBHA-Science-tri3

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Earthquake destruction and seismic waves Page 1 of 3 I. Factors

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Development of the Theory of Plate Tectonics

... locally distort compass readings. This distortion was recognized by Icelandic mariners as early as the late 18th century. More important, because the presence of magnetite gives the basalt measurable magnetic properties, these newly discovered magnetic variations provided another means to study the ...
Continents On The Move
Continents On The Move

... is the process that continuously stirs the entire mantle as old, cold plates sink at subduction zones to the core mantle boundary, and hot rocks rise at the same time towards Earth’s surface beneath a spreading center, forming new lithosphere to replace that lost to subduction (see Mantle and Core). ...
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Summary Table for Three Types of Plate Boundaries

... Oceanic Plate Continental Plate plate Younger, dense Plates fold upward and continent moves over plate plate moves over plate thickens plate is forced , more dense plates are into the mantle in the plate is subducted too light to be subducted subduction zone Volcanoes form island arcs on Volcanic mo ...
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Chapter 10 - Continents

... geologic period. Does this contradict the hypothesis that most of the continental crust was differentiated from the mantle in the first half of Earth’s history? ...
Table of Contents - Mr. Tobin`s Earth Science Class
Table of Contents - Mr. Tobin`s Earth Science Class

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Seafloor Spreading PPT

... In the 1960’s, technology allowed scientists to take pictures with the help of a submersible called ALVIN. It could withstand crushing pressures up to 4 kilometers. ...
Homework01h - Kean University
Homework01h - Kean University

... 5. Objects with spectra shifted to redder colors are moving towards us. True or False? 6. The San Andreas Fault is an example of a transform boundary. True or False? 7. Water driven out of a subducting ocean plate causes partial melting in the nearby mantle. The magma that may rise to form volcanoes ...
2015 Earth`s Structure
2015 Earth`s Structure

... • The Earth is divided into three main layers – the crust, the mantle, and the core- based on the compounds that make up each layer. A compound is a substance composed of two or more elements. The least dense compounds make up the crust and mantle, the densest compounds make up the core. The layers ...
Layers of the Earth
Layers of the Earth

... Mr. Maynard’s Science ...
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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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