PLATE TECHTONICS
... The underwater mountains are known as the Mid-Atlantic Ridge A lot of volcanic action occurs at the ridge Volcanic action occurs when the ocean floor moves away on either side of it Lava wells up and hardens OCEAN/SEA FLOOR SPREADING ...
... The underwater mountains are known as the Mid-Atlantic Ridge A lot of volcanic action occurs at the ridge Volcanic action occurs when the ocean floor moves away on either side of it Lava wells up and hardens OCEAN/SEA FLOOR SPREADING ...
Plate Tectonics - Mr. Brown`s Science Town
... • 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. ...
... • 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. ...
ES Plate Tectonicv2
... Pieces of outermost, rigid layer of the Earth (lithosphere) that move around on the softer layer of the mantle below (asthenosphere) ...
... Pieces of outermost, rigid layer of the Earth (lithosphere) that move around on the softer layer of the mantle below (asthenosphere) ...
Geology Unit Study Guide
... 2. Who proposed the theory of continental drift? 3. Why was this theory not accepted? 4. What caused the tectonic plates to move? 5. What evidence did Wegener have that showed that Pangaea once existed? 6. How has technology aided in the support of continental drift? 7. What is the theory of plate t ...
... 2. Who proposed the theory of continental drift? 3. Why was this theory not accepted? 4. What caused the tectonic plates to move? 5. What evidence did Wegener have that showed that Pangaea once existed? 6. How has technology aided in the support of continental drift? 7. What is the theory of plate t ...
NAME: DATE: PERIOD:
... 12. Contrast the two types of crust on our planet? Oceanic- Denser, younger, thinner Continental- Lighter, older, thicker 13. How do we know that our earth has layers? ...
... 12. Contrast the two types of crust on our planet? Oceanic- Denser, younger, thinner Continental- Lighter, older, thicker 13. How do we know that our earth has layers? ...
Plate Tectonics presentation
... Let’s look at the different plate motion • There are 3 types of boundaries that exist. These are the boundaries between plates. They are: • Divergent boundaries • Convergent boundaries • Transform boundaries ...
... Let’s look at the different plate motion • There are 3 types of boundaries that exist. These are the boundaries between plates. They are: • Divergent boundaries • Convergent boundaries • Transform boundaries ...
Lithosphere - paulding.k12.ga.us
... Let’s look at the different plate motion • There are 3 types of boundaries that exist. These are the boundaries between plates. They are: • Divergent boundaries • Convergent boundaries • Transform boundaries ...
... Let’s look at the different plate motion • There are 3 types of boundaries that exist. These are the boundaries between plates. They are: • Divergent boundaries • Convergent boundaries • Transform boundaries ...
Sea-Floor Spreading
... have a thin layer of crust above a layer of cool hard rocks. Most of them have both continental and oceanic crust. These tectonic plates fit together like joints made by a carpenter. There are about twelve large plates and a few smaller ones. They make up the earth's surface. ...
... have a thin layer of crust above a layer of cool hard rocks. Most of them have both continental and oceanic crust. These tectonic plates fit together like joints made by a carpenter. There are about twelve large plates and a few smaller ones. They make up the earth's surface. ...
Standard 2 Objective 3 STUDY NOTES
... • The theory that explains why and how plate tectonics. continents move is called _____ ...
... • The theory that explains why and how plate tectonics. continents move is called _____ ...
Symposium in celebration of the work of Tony Watts University
... Basins and Mountains 13:45-15:15 Jim Cochran, Lamont-Doherty Earth Observatory Basin subsidence, finite rifting and the Red Sea Garry Karner, ExxonMobil URC Sedimentary basins and hydrocarbons ...
... Basins and Mountains 13:45-15:15 Jim Cochran, Lamont-Doherty Earth Observatory Basin subsidence, finite rifting and the Red Sea Garry Karner, ExxonMobil URC Sedimentary basins and hydrocarbons ...
Geology of Australia and New Zealand, HWS/UC 2007 2. Plate
... similar thickness of upper mantle being part of the lithosphere of the subducting plate (on the right hand side). Release of water and melting of ocean crust from the subducting slab rises to the surface and is deposited within and on top of the upper slab to make thick crust and an island arc, like ...
... similar thickness of upper mantle being part of the lithosphere of the subducting plate (on the right hand side). Release of water and melting of ocean crust from the subducting slab rises to the surface and is deposited within and on top of the upper slab to make thick crust and an island arc, like ...
Overhead: Continental Drift / Plate Tectonics
... themselves with the earth’s magnetic field. ⑥ Mid-oceanic Ridge – Rocks are younger closer to the ridge and older as you move further away from it. ⑦ Satellite Measurements – Satellites have detected that the plates are moving 1-2 cm per year. ...
... themselves with the earth’s magnetic field. ⑥ Mid-oceanic Ridge – Rocks are younger closer to the ridge and older as you move further away from it. ⑦ Satellite Measurements – Satellites have detected that the plates are moving 1-2 cm per year. ...
sci-10-18-1 - St John Brebeuf
... it expands and floats higher. This makes a ridge and pulls the crust thinner; cracks open in the thinner area and magma comes to the surface. As it cools, the magma wedges the plates apart. As the new sea floor cools, its density increases and it sinks down and away from the mid-ocean ridge, pushing ...
... it expands and floats higher. This makes a ridge and pulls the crust thinner; cracks open in the thinner area and magma comes to the surface. As it cools, the magma wedges the plates apart. As the new sea floor cools, its density increases and it sinks down and away from the mid-ocean ridge, pushing ...
Name:______________________________ o ___________________ Samples
... Scientist who discovered the ___________________ o Plates: a section of the lithosphere that slowly ___________________ over the Asthenosphere ___________________ pieces of the continental and oceanic crust Combined continental drift and sea floor spreading into a ___________________ theory o Sc ...
... Scientist who discovered the ___________________ o Plates: a section of the lithosphere that slowly ___________________ over the Asthenosphere ___________________ pieces of the continental and oceanic crust Combined continental drift and sea floor spreading into a ___________________ theory o Sc ...
drifting continents - PNU
... plate boundary (where the plates move away from each other). The Atlantic Ocean was created by this process. The mid-Atlantic Ridge is an area where new sea floor is being created. ...
... plate boundary (where the plates move away from each other). The Atlantic Ocean was created by this process. The mid-Atlantic Ridge is an area where new sea floor is being created. ...
Earth Layers and PT study guide ANSWERS
... 15.Describe sea-floor spreading and the landforms that are created. Sea-floor spreading occurs at mid-ocean ridges where new oceanic crust is created through volcanic activity. Sea-floor spreading creates new oceanic crust and rift valleys. ...
... 15.Describe sea-floor spreading and the landforms that are created. Sea-floor spreading occurs at mid-ocean ridges where new oceanic crust is created through volcanic activity. Sea-floor spreading creates new oceanic crust and rift valleys. ...
What type of boundary is…
... The lithosphere is Earth’s crust plus the rigid upper part of Earth’s mantle. The map shows plates of the lithosphere. What does the map tell you about the plates? A The plates are all moving in the same direction. B The plates are all the same size. C Plates and continents are different. D Where t ...
... The lithosphere is Earth’s crust plus the rigid upper part of Earth’s mantle. The map shows plates of the lithosphere. What does the map tell you about the plates? A The plates are all moving in the same direction. B The plates are all the same size. C Plates and continents are different. D Where t ...
WORLD GEOGRAPHY TODAY Red Flag Questions Pages 63
... 1. What physical processes inside the Earth build up the land? 2. What physical processes on Earth’s surface wear down the land? 3. How do these physical processes interact to create landforms? FORCES BELOW EARTH’S SURFACE ...
... 1. What physical processes inside the Earth build up the land? 2. What physical processes on Earth’s surface wear down the land? 3. How do these physical processes interact to create landforms? FORCES BELOW EARTH’S SURFACE ...
How Do Earthquakes Tell Us About the Earth`s Interior?
... mantle – Act like a blowtorch on plate moving above – Mostly volcanism ...
... mantle – Act like a blowtorch on plate moving above – Mostly volcanism ...
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.