Plate Tectonics II - Clark Science Center
... According to this model, subducted slabs of oceanic lithosphere sink through the 660-km boundary between the asthenosphere and lower mantle, all the way down to the core-mantle boundary, where they melt. ...
... According to this model, subducted slabs of oceanic lithosphere sink through the 660-km boundary between the asthenosphere and lower mantle, all the way down to the core-mantle boundary, where they melt. ...
hot, less dense material is forced upward by the surrounding cooler
... When an oceanic plate runs into a less dense continental plate, the denser oceanic plate sinks (subducts) under the continental plate. The oceanic plate subducts into the mantle at a subduction zone ...
... When an oceanic plate runs into a less dense continental plate, the denser oceanic plate sinks (subducts) under the continental plate. The oceanic plate subducts into the mantle at a subduction zone ...
Layers of the Earth
... subducts underneath the continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming volcanism • E.g. The Andes ...
... subducts underneath the continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming volcanism • E.g. The Andes ...
The Layers of Earth
... Heat maintained by insulation of outer layers Powers all geologic activity ...
... Heat maintained by insulation of outer layers Powers all geologic activity ...
Concept Review
... b. The less dense plate subducts beneath the denser plate. c. The denser plate subducts beneath the less dense plate. d. They both subduct, forming a deep trench. _____ 15. When two continents collide, a. an oceanic deformation will result. b. both continents will be subducted. c. one continent will ...
... b. The less dense plate subducts beneath the denser plate. c. The denser plate subducts beneath the less dense plate. d. They both subduct, forming a deep trench. _____ 15. When two continents collide, a. an oceanic deformation will result. b. both continents will be subducted. c. one continent will ...
Earth and Earth processes
... Why are countries around the Pacific suffering from the threats of earthquakes and volcanism? How much energy and non-metallic + metallic resources are used annually in the US and in the whole world? What was the atmosphere like before 550 million years ago? What caused the major changes in carbon d ...
... Why are countries around the Pacific suffering from the threats of earthquakes and volcanism? How much energy and non-metallic + metallic resources are used annually in the US and in the whole world? What was the atmosphere like before 550 million years ago? What caused the major changes in carbon d ...
es1 and accel plate boundaries lab
... consider the type of crust involved in the collision) 13. Draw 3 triangles to indicate where you would expect to find a volcanic arc 14. What kind of convergent boundary was likely involved in forming the Appalachian mountains? ...
... consider the type of crust involved in the collision) 13. Draw 3 triangles to indicate where you would expect to find a volcanic arc 14. What kind of convergent boundary was likely involved in forming the Appalachian mountains? ...
Heat and Plate Tectonics - Western Reserve Public Media
... The part of Earth we live on is called the crust. This is a very tiny layer on the planet. Beneath that is the mantle. This is a semiliquid layer that is very hot. Temperature range from 5000 F to 7,0000 F, depending how deep you are. ...
... The part of Earth we live on is called the crust. This is a very tiny layer on the planet. Beneath that is the mantle. This is a semiliquid layer that is very hot. Temperature range from 5000 F to 7,0000 F, depending how deep you are. ...
Plate Tectonics Basics – Tutorial Script - FOG
... To understand plate tectonics, we need to look closely at the convecting asthenosphere. The convecting asthenosphere will cause heat to pile up under certain portions of the lithosphere and cold material to sink under other parts. What does that do to the lithosphere? It causes it to break into piec ...
... To understand plate tectonics, we need to look closely at the convecting asthenosphere. The convecting asthenosphere will cause heat to pile up under certain portions of the lithosphere and cold material to sink under other parts. What does that do to the lithosphere? It causes it to break into piec ...
Chapter 7, Section 1 - Answer Key
... Heavier elements are pulled to the center of the Earth by gravity. The elements with less mass are further from the center. 4. List the three layers of the Earth, based on their chemical composition. Crust, mantle, core (outer and inner) 5. Complete Sentence - What three elements make up most of the ...
... Heavier elements are pulled to the center of the Earth by gravity. The elements with less mass are further from the center. 4. List the three layers of the Earth, based on their chemical composition. Crust, mantle, core (outer and inner) 5. Complete Sentence - What three elements make up most of the ...
Week 3 (Norton), part c (pdf, 4.5 MB)
... crew. Interestingly, the CIA history is silent on the cause of the accident, mentioning neither how the agency came to learn of the sub's demise nor the exact location of its resting place 16,500 feet below the surface of Pacific. It is quite likely that this information was Top Secret, and could no ...
... crew. Interestingly, the CIA history is silent on the cause of the accident, mentioning neither how the agency came to learn of the sub's demise nor the exact location of its resting place 16,500 feet below the surface of Pacific. It is quite likely that this information was Top Secret, and could no ...
chapter 2 - HCC Learning Web
... a. Mid Atlantic ridge 2. Paleomagnetism E. Types of Plate Boundaries 1. Divergent= dividing plates a. Mid Atlantic Ridge b. Red Sea c. East African Rift Zone 2. Convergent= plates colliding a. Continent to continent – India / Eurasia b. Continent to ocean- N and S. America / Pacific Coast c. Ocean t ...
... a. Mid Atlantic ridge 2. Paleomagnetism E. Types of Plate Boundaries 1. Divergent= dividing plates a. Mid Atlantic Ridge b. Red Sea c. East African Rift Zone 2. Convergent= plates colliding a. Continent to continent – India / Eurasia b. Continent to ocean- N and S. America / Pacific Coast c. Ocean t ...
EarthComm_c2_esyl
... away from each other. Convergent plate boundaries are where two plates move toward each other. Transform plate boundaries are where two plates slide parallel to each other. Subduction zones are places where one plate moves downward into the mantle beneath the edge of another plate at a convergent pl ...
... away from each other. Convergent plate boundaries are where two plates move toward each other. Transform plate boundaries are where two plates slide parallel to each other. Subduction zones are places where one plate moves downward into the mantle beneath the edge of another plate at a convergent pl ...
Plate Tectonics – How it Works
... chains in the North and South Pacific about inferred poles of Pacific plate motion ...
... chains in the North and South Pacific about inferred poles of Pacific plate motion ...
PDF handout
... Divergent: plates move apart (e.g. down centre of Atlantic, and in south Pacific) Convergent: plates pushed toward one another (e.g. on west side of S. America) ...
... Divergent: plates move apart (e.g. down centre of Atlantic, and in south Pacific) Convergent: plates pushed toward one another (e.g. on west side of S. America) ...
Tectonic Plates
... The Earth's plates are moving apart due to convection currents inside the Earth ...
... The Earth's plates are moving apart due to convection currents inside the Earth ...
Name - Middletown Public Schools
... 5. What might you expect to see at a point on Earth where two plates are pulled apart? (Think about what is under the plates that are moving away from each other.) ...
... 5. What might you expect to see at a point on Earth where two plates are pulled apart? (Think about what is under the plates that are moving away from each other.) ...
Plate Tectonic Test Review
... • A convergent plate boundary resides off the northern shore of California. • We live on the west side of the boundary on the Pacific Plate. Return to Quiz ...
... • A convergent plate boundary resides off the northern shore of California. • We live on the west side of the boundary on the Pacific Plate. Return to Quiz ...
Plate Tectonic Test Review Answers!
... earth’s crust is broken into large moving pieces called plates to which the continents are attached. Along with the evidence that was used to support Continental Drift, new evidence such as sea floor spreading, earthquakes and volcanoes, and actual recorded movement all help support Plate Tectonics. ...
... earth’s crust is broken into large moving pieces called plates to which the continents are attached. Along with the evidence that was used to support Continental Drift, new evidence such as sea floor spreading, earthquakes and volcanoes, and actual recorded movement all help support Plate Tectonics. ...
Plate Tectonics - Awtrey Middle School
... Evidence that Pangaea existed 1. Continents fit together like puzzle pieces (mountain ranges lined up) 2. Mesosaurus – Reptile fossil found on South America and Africa – It couldn’t swim! 3. Glossopteris – Tropical plant fossil that was found in Antarctica! ...
... Evidence that Pangaea existed 1. Continents fit together like puzzle pieces (mountain ranges lined up) 2. Mesosaurus – Reptile fossil found on South America and Africa – It couldn’t swim! 3. Glossopteris – Tropical plant fossil that was found in Antarctica! ...
plates - pribaudo
... of seafloor spreading? o Midocean ridges are warmer than surrounding ocean floors o Active volcanoes on ridges, earthquakes on ridges o Midocean ridge rocks are younger than surrounding ocean floor rocks o Midocean ridge volcanoes are younger than volcanoes further away ...
... of seafloor spreading? o Midocean ridges are warmer than surrounding ocean floors o Active volcanoes on ridges, earthquakes on ridges o Midocean ridge rocks are younger than surrounding ocean floor rocks o Midocean ridge volcanoes are younger than volcanoes further away ...
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.