Unit 4 Lesson 2
... • Scientists have proposed three mechanisms to explain how tectonic plates move: mantle convection, ridge push, and slab pull. • Hotter parts of the mantle rise as cooler, denser parts sink. This kind of movement of material due to differences in density is called convection. • Mantle convection dra ...
... • Scientists have proposed three mechanisms to explain how tectonic plates move: mantle convection, ridge push, and slab pull. • Hotter parts of the mantle rise as cooler, denser parts sink. This kind of movement of material due to differences in density is called convection. • Mantle convection dra ...
Seafloor Spreading Lab with Makeup
... which are evidence for plate tectonics. These patterns show that new seafloor has been forming for millions of years at mid-ocean ridges throughout the oceans. Magma melted within the crust rises to the seafloor, cools and solidifies into new rock. In some places this new seafloor is spli t by movem ...
... which are evidence for plate tectonics. These patterns show that new seafloor has been forming for millions of years at mid-ocean ridges throughout the oceans. Magma melted within the crust rises to the seafloor, cools and solidifies into new rock. In some places this new seafloor is spli t by movem ...
Six Weeks Test Review Key
... 6. Which type of plate boundary that forms fault lines? ____Transform______Sketch: 7. Which type of plate boundary that forms a mid-ocean ridge?_____Divergent____Sketch: 8. Which type of boundary that forms mountains? ____Convergent________Sketch: 9. Continental mountains are formed by what type of ...
... 6. Which type of plate boundary that forms fault lines? ____Transform______Sketch: 7. Which type of plate boundary that forms a mid-ocean ridge?_____Divergent____Sketch: 8. Which type of boundary that forms mountains? ____Convergent________Sketch: 9. Continental mountains are formed by what type of ...
Forces in the Crust Day 2 - Hicksville Public Schools / Homepage
... Volume: the amount of space the rock takes up. The stress transfers energy to the rock causing the rock to bend/stretch. But beyond a certain limit, the rock will break. ...
... Volume: the amount of space the rock takes up. The stress transfers energy to the rock causing the rock to bend/stretch. But beyond a certain limit, the rock will break. ...
Document
... 32,000 Question The main points of evidence that support the continental drift theory? A.Rocks, Habitat, Forestry ...
... 32,000 Question The main points of evidence that support the continental drift theory? A.Rocks, Habitat, Forestry ...
Plate Tectonics Rock Powerpoint
... • Hot spots – isolated, roughly circular plumes of melted rock (magma) that rise from deep in the mantle (Mantle Plume) to the earth's surface • Volcano – a vent (opening) in the Earth’s surface through which magma erupts • Composite volcano – a steep-sided volcano built by lava flows and deposits • ...
... • Hot spots – isolated, roughly circular plumes of melted rock (magma) that rise from deep in the mantle (Mantle Plume) to the earth's surface • Volcano – a vent (opening) in the Earth’s surface through which magma erupts • Composite volcano – a steep-sided volcano built by lava flows and deposits • ...
Exploring Inside Earth
... both dry land and the ocean floor. Oceanic crust consists mostly of rocks such as basalt. Continental crust, the crust that forms the continents, consists mainly of rocks such as granite. CRUST ...
... both dry land and the ocean floor. Oceanic crust consists mostly of rocks such as basalt. Continental crust, the crust that forms the continents, consists mainly of rocks such as granite. CRUST ...
File - Mariana Gil
... crust tends to be denser and thinner than continental crust, so the denser oceanic crust gets bent and pulled under, or subducted, beneath the lighter and thicker continental crust. This forms what is called a subduction zone. As the oceanic crust sinks, a deep oceanic, trench or valley, is formed a ...
... crust tends to be denser and thinner than continental crust, so the denser oceanic crust gets bent and pulled under, or subducted, beneath the lighter and thicker continental crust. This forms what is called a subduction zone. As the oceanic crust sinks, a deep oceanic, trench or valley, is formed a ...
Geography 12
... (continents) moving apart from each other? He looked at the shape of the continents and concluded that because they look like the fit together they must have drifted apart. Later, scientists theorized thatThe supercontinent acted as a thermal cap, allowing thermal activity to increase under the supe ...
... (continents) moving apart from each other? He looked at the shape of the continents and concluded that because they look like the fit together they must have drifted apart. Later, scientists theorized thatThe supercontinent acted as a thermal cap, allowing thermal activity to increase under the supe ...
Formation of the Crust and Continents
... Earth’s Early Heat Sources 2. Gravitational contraction ...
... Earth’s Early Heat Sources 2. Gravitational contraction ...
Vocabulary Quiz #26 4/4/11- 4/8/11
... Vocabulary Quiz #26 4/4/11- 4/8/11 1. continental drift- the hypothesis that the continents slowly move across Earth’s surface. 2. convection currents- the movement of a fluid, caused by differences in temperature, that transfers thermal energy from one place to another. 3. mid-ocean ridge- the unde ...
... Vocabulary Quiz #26 4/4/11- 4/8/11 1. continental drift- the hypothesis that the continents slowly move across Earth’s surface. 2. convection currents- the movement of a fluid, caused by differences in temperature, that transfers thermal energy from one place to another. 3. mid-ocean ridge- the unde ...
1 Planet Earth
... Earth is a differentiated planet, with its materials segregated and concentrated into layers according to density. The internal layers based on composition are (a) crust, (b) mantle, and (c) core. The major internal layers based on physical properties are (a)lithosphere, (b) asthenosphere, (c) mesos ...
... Earth is a differentiated planet, with its materials segregated and concentrated into layers according to density. The internal layers based on composition are (a) crust, (b) mantle, and (c) core. The major internal layers based on physical properties are (a)lithosphere, (b) asthenosphere, (c) mesos ...
Plate Tectonics - ByrneScience 2010
... This movement causes an earthquake. 2. Volcanoes are formed when plates move apart or collide. 3. When two plates collide, one plate is pushed up and the other slides under. Part of the crust that slides under is melted, and forms magma and can be forced through vents to form volcanic mountains. 4. ...
... This movement causes an earthquake. 2. Volcanoes are formed when plates move apart or collide. 3. When two plates collide, one plate is pushed up and the other slides under. Part of the crust that slides under is melted, and forms magma and can be forced through vents to form volcanic mountains. 4. ...
Chapter 1 - Geological Sciences
... 3. Develop multiple working hypotheses (ideas to explain the observations) 4. Test the hypotheses by experimenting and either accept, reject, or modify the hypothesis. The simplest explanation is best. 5. When a hypothesis has considerable experimental or observational support, it is accepted and ot ...
... 3. Develop multiple working hypotheses (ideas to explain the observations) 4. Test the hypotheses by experimenting and either accept, reject, or modify the hypothesis. The simplest explanation is best. 5. When a hypothesis has considerable experimental or observational support, it is accepted and ot ...
Earth Science Unit Review
... (iv) No, there is no material that can flow in currents. 42. Slab pull occurs at subduction zones, where a part of a plate dives into the mantle, pulling the plate material behind down with it. Ridge push occurs at spreading ridges, where mantle material reaching the surface pushes plates apart. 43. ...
... (iv) No, there is no material that can flow in currents. 42. Slab pull occurs at subduction zones, where a part of a plate dives into the mantle, pulling the plate material behind down with it. Ridge push occurs at spreading ridges, where mantle material reaching the surface pushes plates apart. 43. ...
Editorial - The Journal of Indian Geophysical Union
... super continent called Pangaea. Overall there are seven major plates: North America, South America, Eurasia, Africa, IndoAustralian, Pacific and Antarctica. Mantle convection, Earth rotation and gravity are all drivers of the movement. As these plates interact they form plate boundaries, which cause ...
... super continent called Pangaea. Overall there are seven major plates: North America, South America, Eurasia, Africa, IndoAustralian, Pacific and Antarctica. Mantle convection, Earth rotation and gravity are all drivers of the movement. As these plates interact they form plate boundaries, which cause ...
Computer model shows continents sometimes push
... convergent plate margins have been the principal sites of lateral continental growth through Earth's history. Modern examples of accretionary margins are the North American Cordilleras and southwest Pacific subduction zones. The geologic record contains abundant accretionary orogens, such as the Tas ...
... convergent plate margins have been the principal sites of lateral continental growth through Earth's history. Modern examples of accretionary margins are the North American Cordilleras and southwest Pacific subduction zones. The geologic record contains abundant accretionary orogens, such as the Tas ...
Japan * Tectonic Case Study
... oceanic pacific plate is subducted underneath the continental North American plate at the Kuril trench and the Japan Trench. ...
... oceanic pacific plate is subducted underneath the continental North American plate at the Kuril trench and the Japan Trench. ...
2nd 9 Weeks Test Review
... limiting factor—anything that limits the number of individuals living in an area lithosphere—crust and upper part of the mantle ...
... limiting factor—anything that limits the number of individuals living in an area lithosphere—crust and upper part of the mantle ...
Unit 5: Ocean Floor Structure and Plate Tectonics
... geothermal vents on land. Hydrothermal vents in the ocean floor are called submarine hydrothermal vents, or black smokers. They were discovered in 1977 around the Galapagos Islands by the NOAA using a small submersible called Alvin. They are usually hundreds of meters wide and are formed when water, ...
... geothermal vents on land. Hydrothermal vents in the ocean floor are called submarine hydrothermal vents, or black smokers. They were discovered in 1977 around the Galapagos Islands by the NOAA using a small submersible called Alvin. They are usually hundreds of meters wide and are formed when water, ...
Discovering Plate Boundaries
... •Earthquakes complex, shallow (to medium) on both sides •Age data not symmetrical, one side of boundary •Complex topography, wide mountains and basins •Rocks? ...
... •Earthquakes complex, shallow (to medium) on both sides •Age data not symmetrical, one side of boundary •Complex topography, wide mountains and basins •Rocks? ...
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.