Plate Tectonics Review
... hint of plate tectonics? a. Mid-ocean ridges b. Deep-sea trenches c. Volcanic island arcs d. Continental mountain chains 15. Deep-sea trenches occur where? a. divergent boundaries b. convergent boundaries c. transform boundaries d. all of the above 16. What boundary forms volcanoes along the coast o ...
... hint of plate tectonics? a. Mid-ocean ridges b. Deep-sea trenches c. Volcanic island arcs d. Continental mountain chains 15. Deep-sea trenches occur where? a. divergent boundaries b. convergent boundaries c. transform boundaries d. all of the above 16. What boundary forms volcanoes along the coast o ...
see powerpoint
... The process by which new oceanic crust forms at mid-ocean ridges as tectonic plates are pulled away from each other. ...
... The process by which new oceanic crust forms at mid-ocean ridges as tectonic plates are pulled away from each other. ...
Unit D Test Review - Bibb County Schools
... of the earth’s crust have moved toward and away from each other to form continents, mountains, and oceans. ...
... of the earth’s crust have moved toward and away from each other to form continents, mountains, and oceans. ...
Homework 1
... will show this scale). What do the different colored bands on the timescale represent? Hint: you may have to look at a geologic time scale from a different source. ...
... will show this scale). What do the different colored bands on the timescale represent? Hint: you may have to look at a geologic time scale from a different source. ...
layers-of-the-earth-d-rl-2016
... Match the correct description with the correct term. Write the letter in the space provided. ...
... Match the correct description with the correct term. Write the letter in the space provided. ...
Plate Tectonics Powerpoint by M.A. Garcia
... Earth’s Puzzle • What plate do we live on? • What plates do we border? • USGS Earth’s Plates • How far do we move every year? ...
... Earth’s Puzzle • What plate do we live on? • What plates do we border? • USGS Earth’s Plates • How far do we move every year? ...
The Theory of Plate Tectonics
... Plates move due to convection currents in the Astenosphere. The inner fluids become hotter than the outer ones. Hot fluids are less dense than cold ones, so they ascend while the colder ones descend. This makes what we call convection currents. ...
... Plates move due to convection currents in the Astenosphere. The inner fluids become hotter than the outer ones. Hot fluids are less dense than cold ones, so they ascend while the colder ones descend. This makes what we call convection currents. ...
How Plates Create
... A deep-ocean trench may form where oceanic crust sinks toward the mantle beneath continental crust. Some of the oceanic crust melts to form magma. ...
... A deep-ocean trench may form where oceanic crust sinks toward the mantle beneath continental crust. Some of the oceanic crust melts to form magma. ...
Name: Pd: Plate Tectonics Unit Test Study Guide S6E5a. Compare
... 11. Most geologists rejected Alfred Wegener’s idea of continental drift because he could not explain HOW they moved or the force that caused them to move 12. What causes the movement of tectonic plates? Convection currents below the lithosphere 13. What is Pangaea? The name of the super continent wh ...
... 11. Most geologists rejected Alfred Wegener’s idea of continental drift because he could not explain HOW they moved or the force that caused them to move 12. What causes the movement of tectonic plates? Convection currents below the lithosphere 13. What is Pangaea? The name of the super continent wh ...
theory of continental drift
... • There are seven major plates – The Pacific Plate• which covers 1/5 of the Earth ...
... • There are seven major plates – The Pacific Plate• which covers 1/5 of the Earth ...
Chapter 12.1 Notes
... There was evidence of different climates, (eg. such as glaciers) on warm continents. Like pieces of a jigsaw puzzle, the continents fit together into one, large whole. ...
... There was evidence of different climates, (eg. such as glaciers) on warm continents. Like pieces of a jigsaw puzzle, the continents fit together into one, large whole. ...
Earth`s 3 Layers 2 Types of Crust 2 Mantle Regions 2 Core Regions
... Causes of Plate Motion Use pages269-270 to help you answer the following questions. 1. The main source of downward convection flow in the mantle is called ____. a. ridge-pull c. slab-push b. slab-pull d. ridge-push 2. The downward sliding characteristic of ridge-push is the result of ____. a. gravit ...
... Causes of Plate Motion Use pages269-270 to help you answer the following questions. 1. The main source of downward convection flow in the mantle is called ____. a. ridge-pull c. slab-push b. slab-pull d. ridge-push 2. The downward sliding characteristic of ridge-push is the result of ____. a. gravit ...
Plate Tectonics Links together 2 theories
... Pacific Plate is largest 1/5 of Earth’s surface containing Los Angeles, California ...
... Pacific Plate is largest 1/5 of Earth’s surface containing Los Angeles, California ...
Study Guide for Plate Tectonics, Earthquakes and Volcanoes
... 2. What concept was proposed by Alfred Wegener? 3. Provide examples of evidence that support the concept of continental drift. 4. What was the name of the most recent supercontinent? 5. What contribution did Harry Hess make to understanding plate tectonics? 6. What evidence exists to support sea flo ...
... 2. What concept was proposed by Alfred Wegener? 3. Provide examples of evidence that support the concept of continental drift. 4. What was the name of the most recent supercontinent? 5. What contribution did Harry Hess make to understanding plate tectonics? 6. What evidence exists to support sea flo ...
Shortly after the Earth formed, heat released by colliding particles
... the Theory of Plate tectonics: • The lithosphere (crust & upper mantle) is broken into puzzle pieces called tectonic plates. • Oceanic plates are more dense than continental. • Therefore, oceanic plates will be subducted (pushed underneath) continental. ...
... the Theory of Plate tectonics: • The lithosphere (crust & upper mantle) is broken into puzzle pieces called tectonic plates. • Oceanic plates are more dense than continental. • Therefore, oceanic plates will be subducted (pushed underneath) continental. ...
plate tectonics
... The Earth’s crust is divided into 12 major plates which are moved in various directions. This plate motion causes them to collide, pull apart, or scrape against each other. Each type of interaction causes a characteristic set of Earth structures or “tectonic” features. The word, tectonic, re ...
... The Earth’s crust is divided into 12 major plates which are moved in various directions. This plate motion causes them to collide, pull apart, or scrape against each other. Each type of interaction causes a characteristic set of Earth structures or “tectonic” features. The word, tectonic, re ...
Dynamic Ocean Floor
... – crust older than the Cretaceous period cannot be found in any ocean basin. • Deep focus quakes (100-600 km) occur in this area. • As the magma melts pressure builds up and the result is volcanic eruptions. ...
... – crust older than the Cretaceous period cannot be found in any ocean basin. • Deep focus quakes (100-600 km) occur in this area. • As the magma melts pressure builds up and the result is volcanic eruptions. ...
Chapter 17 Geo Reading Questions KEY
... 2. What are the relationships among mantle convection, ocean ridges, and subduction zones? Upward mantle convection is thought to be associated with ridges, while downward mantle convection is associated wi ...
... 2. What are the relationships among mantle convection, ocean ridges, and subduction zones? Upward mantle convection is thought to be associated with ridges, while downward mantle convection is associated wi ...
9.5 Mechanisms of Plate Motion
... Driving force for plate movement is the unequal distribution of heat in earth. Convection – method of heat transfer in fluids where hot material rises and cold material sinks ...
... Driving force for plate movement is the unequal distribution of heat in earth. Convection – method of heat transfer in fluids where hot material rises and cold material sinks ...
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.