Tectonic Plate Boundaries
... Think: Plates are movingmoving away, towards, or past each other! What ...
... Think: Plates are movingmoving away, towards, or past each other! What ...
Chapter 8 Plate Tectonics
... • Rigid, moving pieces of Earth’s crust and upper mantle • Asthenosphere • Partially melted layer on top of which the lithosphere moves ...
... • Rigid, moving pieces of Earth’s crust and upper mantle • Asthenosphere • Partially melted layer on top of which the lithosphere moves ...
Plate Tectonics
... • As plates move apart, new crust forms Cause of movement is convection cells in mantle • Mid ocean ridges are divergent boundaries where seafloor spreading occurs – an example is the Mid-Atlantic Ridge. • Rift valleys are divergent boundaries on land – The Great Rift Valley in east Africa is an exa ...
... • As plates move apart, new crust forms Cause of movement is convection cells in mantle • Mid ocean ridges are divergent boundaries where seafloor spreading occurs – an example is the Mid-Atlantic Ridge. • Rift valleys are divergent boundaries on land – The Great Rift Valley in east Africa is an exa ...
Plate Tectonic Theory Picture Vocabulary
... A cyclical motion occurs because of density differences in the mantle. Heated, less dense lower regions of the fluid mantle rise, and denser, cooler regions sink due to gravity. The combined motions serve as the engine for crustal plate movement. ...
... A cyclical motion occurs because of density differences in the mantle. Heated, less dense lower regions of the fluid mantle rise, and denser, cooler regions sink due to gravity. The combined motions serve as the engine for crustal plate movement. ...
THE LITHOSPERE AND PLATE TECTONICS The layer of the
... typically moving a few centimeters a year, and are driven by convection in the mantle. The scientific theory that describes this phenomenon is called plate tectonics. According to the theory of plate tectonics, the lithosphere is comprised of some seven major plates and several smaller ones. Because ...
... typically moving a few centimeters a year, and are driven by convection in the mantle. The scientific theory that describes this phenomenon is called plate tectonics. According to the theory of plate tectonics, the lithosphere is comprised of some seven major plates and several smaller ones. Because ...
Chapter Two Notes
... What is ‘ Plate Tectonics’? • From Greek ‘tektonikus’ meaning building or construction • Plate tectonics refers to the process of plate formation, movement, and destruction. ...
... What is ‘ Plate Tectonics’? • From Greek ‘tektonikus’ meaning building or construction • Plate tectonics refers to the process of plate formation, movement, and destruction. ...
Earth Science
... pieces of continental and oceanic crust. 13. The theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle. 14. Vibrations that travel through Earth carrying the energy released during an earthquake. 15. The movement of a fluids caused by differenc ...
... pieces of continental and oceanic crust. 13. The theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle. 14. Vibrations that travel through Earth carrying the energy released during an earthquake. 15. The movement of a fluids caused by differenc ...
Plate Tectonics Key Concepts List
... A boundary where two plates collide………………………………………convergent A boundary where two plates move away from each other…………………divergent The part of the mantle that can bend like plastic……………………….asthenosphere The process that continually adds new material to the ocean floor…………sea-floor spreadin ...
... A boundary where two plates collide………………………………………convergent A boundary where two plates move away from each other…………………divergent The part of the mantle that can bend like plastic……………………….asthenosphere The process that continually adds new material to the ocean floor…………sea-floor spreadin ...
Plate Tectonics – The Lecture Notes
... a) Continental Rocks date the Earth at about 5 billion years old. Since the ocean floor is lower in the lithosphere, scientists expected to find older rocks at those depths. Continental geology’s law of Superposition states that oldest rocks are laid down first and should be found horizontally lowes ...
... a) Continental Rocks date the Earth at about 5 billion years old. Since the ocean floor is lower in the lithosphere, scientists expected to find older rocks at those depths. Continental geology’s law of Superposition states that oldest rocks are laid down first and should be found horizontally lowes ...
Review sheet for Exam 1, Locations and Maps
... ASTR/GEOL 1070: The Earth: Its Physical Environment ...
... ASTR/GEOL 1070: The Earth: Its Physical Environment ...
World Geography ch2, sec 2 terms and places to
... 5. The _____________________ is the thick middle layer of the earth’s interior structure, consisting of dense, hot rock. 6. ________________________________ is the theory that the continents were once joined and then slowly drifted apart. 7._______________________________ refers to chemical or physi ...
... 5. The _____________________ is the thick middle layer of the earth’s interior structure, consisting of dense, hot rock. 6. ________________________________ is the theory that the continents were once joined and then slowly drifted apart. 7._______________________________ refers to chemical or physi ...
CH 9 Plate tectonics
... * Move slowly about 5 cm or 2.5” per year * Plate movement causes EQs, volcanoes, & create mountains ...
... * Move slowly about 5 cm or 2.5” per year * Plate movement causes EQs, volcanoes, & create mountains ...
Plate Tectonics
... that lived 270 million years ago • remains (fossils) found in South America and Africa • impossible for these reptiles to have crossed the Atlantic ...
... that lived 270 million years ago • remains (fossils) found in South America and Africa • impossible for these reptiles to have crossed the Atlantic ...
Plate Tectonics
... that lived 270 million years ago • remains (fossils) found in South America and Africa • impossible for these reptiles to have crossed the Atlantic ...
... that lived 270 million years ago • remains (fossils) found in South America and Africa • impossible for these reptiles to have crossed the Atlantic ...
Plate Tectonics
... Why do the Plates move? -CONVECTION CURRENTS in the MANTLE!!! -hot magma from deep inside Earth rises. -cools as it rises. -sinks back into deep Earth as it cools. ...
... Why do the Plates move? -CONVECTION CURRENTS in the MANTLE!!! -hot magma from deep inside Earth rises. -cools as it rises. -sinks back into deep Earth as it cools. ...
Continental Drift Hypothesis - states that the continents had once
... Plate Tectonics - the theory that proposes that Earth’s outer shell consists of individual plates that interact in various ways and thereby produce earthquakes, volcanoes, mountains, and the crust itself. Plate - one of numerous rigid sections of the lithosphere that move as a unit over the material ...
... Plate Tectonics - the theory that proposes that Earth’s outer shell consists of individual plates that interact in various ways and thereby produce earthquakes, volcanoes, mountains, and the crust itself. Plate - one of numerous rigid sections of the lithosphere that move as a unit over the material ...
Plate Tectonics Test Review
... • Sea Floor Spreading: the process by which molten material adds new oceanic crust to the seafloor Evidence 1. molten material 2. magnetic stripes 3. drilling samples ...
... • Sea Floor Spreading: the process by which molten material adds new oceanic crust to the seafloor Evidence 1. molten material 2. magnetic stripes 3. drilling samples ...
PANGAEAPOWERPOINT
... pieces of a puzzle…..the shapes of the coastlines of Africa and South America are a good example. As you discovered through your modeling activity, they once fit together. The Earth as we see it was not always like it is today. Land masses have been pulled apart and joined together by the process we ...
... pieces of a puzzle…..the shapes of the coastlines of Africa and South America are a good example. As you discovered through your modeling activity, they once fit together. The Earth as we see it was not always like it is today. Land masses have been pulled apart and joined together by the process we ...
Unit 2 Vocabulary – Plate Tectonics
... lithosphere – the layer of Earth made up of the crust and upper mantle asthenosphere – the plastic-like, but solid, layer in the mantle which allows the lithosphere above to move continental drift hypothesis – the continents once formed a giant landmass (Pangaea), broke apart, and then drifted to th ...
... lithosphere – the layer of Earth made up of the crust and upper mantle asthenosphere – the plastic-like, but solid, layer in the mantle which allows the lithosphere above to move continental drift hypothesis – the continents once formed a giant landmass (Pangaea), broke apart, and then drifted to th ...
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.