Sea floor spreading= the process by which new oceanic crust is
... place to go. It is forced upwards and forms volcanoes and mountain ranges fairly close to the shore. Won’t we eventually run out of crust you may ask? Well, at the mid-ocean ridge, new crust is being formed through the process of sea-floor spreading. Mantle convection causes new hot rock to be force ...
... place to go. It is forced upwards and forms volcanoes and mountain ranges fairly close to the shore. Won’t we eventually run out of crust you may ask? Well, at the mid-ocean ridge, new crust is being formed through the process of sea-floor spreading. Mantle convection causes new hot rock to be force ...
Plate Tectonics
... 1. Hand-out guided note sheets to students. 2. Instruct students to follow along with the ppt. and fill in the appropriate blanks. 3. Show ppt. on Plate Tectonics. 4. Incorporate questions into the ppt. as we go along. 5. Discuss how the theory of continental drift came to be. 6. Discuss Alfred Wege ...
... 1. Hand-out guided note sheets to students. 2. Instruct students to follow along with the ppt. and fill in the appropriate blanks. 3. Show ppt. on Plate Tectonics. 4. Incorporate questions into the ppt. as we go along. 5. Discuss how the theory of continental drift came to be. 6. Discuss Alfred Wege ...
Convergent boundary
... What is the Theory of Plate Tectonics? • It states that pieces of Earth’s lithosphere are in a slow, constant motion, driven by convection currents in the mantle. • As the plates move, they collide, pull apart, or grind past each other, producing spectacular changes in Earth’s surface. These changes ...
... What is the Theory of Plate Tectonics? • It states that pieces of Earth’s lithosphere are in a slow, constant motion, driven by convection currents in the mantle. • As the plates move, they collide, pull apart, or grind past each other, producing spectacular changes in Earth’s surface. These changes ...
PANGEA
... moving. 2Parts of the crust slowly move into, under, or away from each other. 3The drift of the continents is so slow (about 1.5 inches per year) that it is not noticeable unless it's viewed over millions of years. 'B 4Have you ever put together a jigsaw puzzle? 5Think of the continents as large pie ...
... moving. 2Parts of the crust slowly move into, under, or away from each other. 3The drift of the continents is so slow (about 1.5 inches per year) that it is not noticeable unless it's viewed over millions of years. 'B 4Have you ever put together a jigsaw puzzle? 5Think of the continents as large pie ...
(1) the distribution of fossils on different continents
... • Fossils on different continents are similar to fossils on continents that were once connected. When the continents split, different life forms developed. • Most continental and oceanic floor features are the result of geological activity and earthquakes along plate boundaries. The exact patterns ...
... • Fossils on different continents are similar to fossils on continents that were once connected. When the continents split, different life forms developed. • Most continental and oceanic floor features are the result of geological activity and earthquakes along plate boundaries. The exact patterns ...
The Ellipse
... Earth is a layered planet. Its layers are the core, mantle, and crust. Each layer is a different composition. Note: with Plate Tectonics Theory, different layers are classified according to the way they deform. These layers are the lithosphere, a rigid outer layer containing the crust and upper-mant ...
... Earth is a layered planet. Its layers are the core, mantle, and crust. Each layer is a different composition. Note: with Plate Tectonics Theory, different layers are classified according to the way they deform. These layers are the lithosphere, a rigid outer layer containing the crust and upper-mant ...
Document
... • Most divergent boundaries coincide with the crests of submarine mountain ranges, called mid-oceanic ridges. • Fig. 1.11 Back ...
... • Most divergent boundaries coincide with the crests of submarine mountain ranges, called mid-oceanic ridges. • Fig. 1.11 Back ...
Slide 1
... 1. The jigsaw-puzzle fit of continents on both sides of the ocean and the similarity of geological features on opposite sides of the Atlantic ocean. 2. Match-up of glacier markings of the Southern ...
... 1. The jigsaw-puzzle fit of continents on both sides of the ocean and the similarity of geological features on opposite sides of the Atlantic ocean. 2. Match-up of glacier markings of the Southern ...
Plate Tectonics - Nutley Public Schools
... than the cooler material at the top of the mantle. The cooler material is more dense so it sinks. This cycle repeats itself and is known as a convection current. (Think of our Boiling pot of water or our Convection experiment with the bottle and candle. ) This process drives our plate movement. ...
... than the cooler material at the top of the mantle. The cooler material is more dense so it sinks. This cycle repeats itself and is known as a convection current. (Think of our Boiling pot of water or our Convection experiment with the bottle and candle. ) This process drives our plate movement. ...
NAME: . Plate Tectonics and Earthquake Scavenger Hunt 1st SITE
... Continental plate meets oceanic plate Two continental plates meet Two oceanic plates meet - ...
... Continental plate meets oceanic plate Two continental plates meet Two oceanic plates meet - ...
Plate Tectonics – Unit 8 – Study Guide
... 42. At convergent boundaries oceanic plates will go under continental plates because oceanic crust is more dense than continental crust. 43. Oceanic-continental convergent boundaries can form mountains. 44. At convergent plate boundaries known as subduction zones, a trench and deep earthquakes mark ...
... 42. At convergent boundaries oceanic plates will go under continental plates because oceanic crust is more dense than continental crust. 43. Oceanic-continental convergent boundaries can form mountains. 44. At convergent plate boundaries known as subduction zones, a trench and deep earthquakes mark ...
Slide 1
... Magma close to the core is heated, It expands, lowering its density, and then rises Closer to the crust, the magma cools, it contracts, increasing its density, and then sinks due to gravity ...
... Magma close to the core is heated, It expands, lowering its density, and then rises Closer to the crust, the magma cools, it contracts, increasing its density, and then sinks due to gravity ...
Twenty-year study yields precise model of tectonic-plate
... Earth's surface," explains DeMets. "Plate tectonics them how quickly new crust is being formed. Most describes almost everything about how the Earth's plate boundaries are currently moving at rates of 15 surface moves and deforms, but it's remarkably to 200 millimeters per year, DeMets says. simple ...
... Earth's surface," explains DeMets. "Plate tectonics them how quickly new crust is being formed. Most describes almost everything about how the Earth's plate boundaries are currently moving at rates of 15 surface moves and deforms, but it's remarkably to 200 millimeters per year, DeMets says. simple ...
Chapter 2 Canada*s Physical Landscape
... Transform plates move past each other in opposite directions ...
... Transform plates move past each other in opposite directions ...
Plate Tectonics Inside Earth Chapter 1 Study
... 1. Harry Hess examined maps of the mid-ocean ridge and from his work realized that Wegener’s theory may have been correct. 2. He also came up with the idea that the ocean floor moves like conveyor belts, carrying the continents along with them. 3. At the mid-ocean ridge, molten material rises from t ...
... 1. Harry Hess examined maps of the mid-ocean ridge and from his work realized that Wegener’s theory may have been correct. 2. He also came up with the idea that the ocean floor moves like conveyor belts, carrying the continents along with them. 3. At the mid-ocean ridge, molten material rises from t ...
TECTONIC PLATES
... The locations of volcanoes can also help identify the locations of plate boundaries. Some volcanoes form when plate motions generate magma that erupts on Earth’s surface. For example, the Pacific Ring of Fire is a zone of active volcanoes that encircles the Pacific Ocean. This zone is also one of Ea ...
... The locations of volcanoes can also help identify the locations of plate boundaries. Some volcanoes form when plate motions generate magma that erupts on Earth’s surface. For example, the Pacific Ring of Fire is a zone of active volcanoes that encircles the Pacific Ocean. This zone is also one of Ea ...
The Birth of a Theory
... volcanic islands called a volcanic island arc. When two plates carrying continental crust converge, both plates are too buoyant to be subducted. The result is a "collision" resulting in the formation of a mountain belt such as the Himalayas. Transform fault boundaries occur where plates grind past e ...
... volcanic islands called a volcanic island arc. When two plates carrying continental crust converge, both plates are too buoyant to be subducted. The result is a "collision" resulting in the formation of a mountain belt such as the Himalayas. Transform fault boundaries occur where plates grind past e ...
File - Mr Michael mccloskey
... 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 ...
Living in an Active Zone
... • Two oceanic plates move away from each other shield volcanoes form creating mid ocean ridges e.g. mid Atlantic ridge. • When two continental plate move apart a rift valleys are formed. Shield volcanoes found here e.g. Iceland ...
... • Two oceanic plates move away from each other shield volcanoes form creating mid ocean ridges e.g. mid Atlantic ridge. • When two continental plate move apart a rift valleys are formed. Shield volcanoes found here e.g. Iceland ...
rocks and minerals quiz
... (A) Subduction zones (B) Transform boundaries (C) Oceanic ridges (D) Mountains (E) Rift valleys 17. In some places two oceanic plates converge. One plate stays at the surface and the other plate dives down beneath it. This process is called: (A) convergence (B) subduction (C) divergence (D) transfor ...
... (A) Subduction zones (B) Transform boundaries (C) Oceanic ridges (D) Mountains (E) Rift valleys 17. In some places two oceanic plates converge. One plate stays at the surface and the other plate dives down beneath it. This process is called: (A) convergence (B) subduction (C) divergence (D) transfor ...
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.