Theory of plate tectonics | sample answer
... in a process called folding. The uplifted land can be called fold mountains and an example is the Himalayas. Areas in which crust is created are called constructive plate boundaries. An example is a mid ocean ridge, deep under the ocean floor where land is created (Mid-Atlantic ridge has occurred du ...
... in a process called folding. The uplifted land can be called fold mountains and an example is the Himalayas. Areas in which crust is created are called constructive plate boundaries. An example is a mid ocean ridge, deep under the ocean floor where land is created (Mid-Atlantic ridge has occurred du ...
Now
... • It is a place of intense volcanic and earthquake activity. • These patterns show that the earth is divided into sections, or plates. ...
... • It is a place of intense volcanic and earthquake activity. • These patterns show that the earth is divided into sections, or plates. ...
I. Convergent plate boundaries (destructive margins) (colliding
... b. Age of deepest sediments in any area (those upon basalt sea floor) 1) Youngest are near the ridges 2) Older are at a distance from the ridge c. Supports tectonic hypothesis prediction that ocean basins are geologically young 1. oldest sea floor sediments found are 180 m.a. 2. continental crust, b ...
... b. Age of deepest sediments in any area (those upon basalt sea floor) 1) Youngest are near the ridges 2) Older are at a distance from the ridge c. Supports tectonic hypothesis prediction that ocean basins are geologically young 1. oldest sea floor sediments found are 180 m.a. 2. continental crust, b ...
File
... Since earthquakes usually occur at the boundaries of crustal plates, it makes sense to plot the locations of major earthquakes on a world map. Earth’s crust is comprised of a series of rigid crustal plates that move over the asthenosphere. This is the source of magma for volcanos. ...
... Since earthquakes usually occur at the boundaries of crustal plates, it makes sense to plot the locations of major earthquakes on a world map. Earth’s crust is comprised of a series of rigid crustal plates that move over the asthenosphere. This is the source of magma for volcanos. ...
Plate Tectonics
... and sea floor spreading. • (Based on continental drift ideas but stronger). • Sea floor spreading – a hypothesis that there is a crack between plates under the sea that allows magma to reach the surface and form new seafloor ...
... and sea floor spreading. • (Based on continental drift ideas but stronger). • Sea floor spreading – a hypothesis that there is a crack between plates under the sea that allows magma to reach the surface and form new seafloor ...
Chapter 9 WS #1
... # Complete the following chart by placing check marks in the appropriate columns. Geologic Process ...
... # Complete the following chart by placing check marks in the appropriate columns. Geologic Process ...
Practice 1 - WordPress.com
... 2silicate rocks that are semimolten at depth, and the thin,, solid-surface crust. There are 3two kinds of crust, a lower and denser oceanic crust and an upper, lighter continental 4crust found over only about 40 percent of the Earth's surface. The rocks of the crust are 5of very different ages. Some ...
... 2silicate rocks that are semimolten at depth, and the thin,, solid-surface crust. There are 3two kinds of crust, a lower and denser oceanic crust and an upper, lighter continental 4crust found over only about 40 percent of the Earth's surface. The rocks of the crust are 5of very different ages. Some ...
Chap7Sect2 -Cont Drift and Sea-floor
... at the mid-ocean ridge. Molten material erupts and spreads out through the valley that runs along the center of the mid-ocean ridge. It then pushes aside the rock that was already there. ...
... at the mid-ocean ridge. Molten material erupts and spreads out through the valley that runs along the center of the mid-ocean ridge. It then pushes aside the rock that was already there. ...
Tectonics Boundaries Student Sheet 1 Divergent
... Describe the height distribution of the oceanic crust in relation to the plate boundary. _______________________________________________________________ ...
... Describe the height distribution of the oceanic crust in relation to the plate boundary. _______________________________________________________________ ...
Plate Tectonics - Boone County Schools
... tectonic plates push into one another. The three types of convergent boundaries are continental/continental, continental/oceanic, and oceanic/oceanic. • Divergent – Occurs when two tectonic plates move away from one another. Mid-ocean ridges are the most common divergent boundary, but they can also ...
... tectonic plates push into one another. The three types of convergent boundaries are continental/continental, continental/oceanic, and oceanic/oceanic. • Divergent – Occurs when two tectonic plates move away from one another. Mid-ocean ridges are the most common divergent boundary, but they can also ...
Geology :: 7. Plate interiors
... The abyssal plains are found at depths between 3,000 and 6,000 meters. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest and least explored regions on Earth. Abyssal plains a ...
... The abyssal plains are found at depths between 3,000 and 6,000 meters. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest and least explored regions on Earth. Abyssal plains a ...
Print › Explaining plate collisions | Quizlet
... This is when a denser oceanic plate is subducted underneath a continental plate because the oceanic plate is more dense. In addition, the molten rock from the oceanic plate rises and it rises into the volcano as magma is denser in the lithospheric mantle. ...
... This is when a denser oceanic plate is subducted underneath a continental plate because the oceanic plate is more dense. In addition, the molten rock from the oceanic plate rises and it rises into the volcano as magma is denser in the lithospheric mantle. ...
Convection Currents and Hot Spots
... Convection Current • the hot mantle deep in Earth moves: hot rock expands, decreasing its density and begins to rise; • Colder and/or denser rock sinks ...
... Convection Current • the hot mantle deep in Earth moves: hot rock expands, decreasing its density and begins to rise; • Colder and/or denser rock sinks ...
HOT SPOTS - Norwich High School
... Convection Current • the hot mantle deep in Earth moves: hot rock expands, decreasing its density and begins to rise; • Colder and/or denser rock sinks ...
... Convection Current • the hot mantle deep in Earth moves: hot rock expands, decreasing its density and begins to rise; • Colder and/or denser rock sinks ...
A fault is a CRACK in the Earth. 1. A tsunami is a giant wave formed
... 8. The SIERRA NEVADA Mountains are FAULT BLOCK mountains that form when PLATES RUB TOGETHER. 9. MAGMA RISING can cause the sea floor to spread apart. 10. You often see snow on mountain tops because th ...
... 8. The SIERRA NEVADA Mountains are FAULT BLOCK mountains that form when PLATES RUB TOGETHER. 9. MAGMA RISING can cause the sea floor to spread apart. 10. You often see snow on mountain tops because th ...
Plate Tectonics
... cracked shell of an egg •the pieces of the shell are Earth's tectonic plates -- there are 12 major ones -- and they float along on vast convection currents in the asthenosphere •the asthenosphere churns like a fluid ...
... cracked shell of an egg •the pieces of the shell are Earth's tectonic plates -- there are 12 major ones -- and they float along on vast convection currents in the asthenosphere •the asthenosphere churns like a fluid ...
Unit 4.2 Test Review Layer Composition Thickness State of Matter
... 10. At a convergent boundary of an oceanic and a continental plate, the oceanic plate will subduct under the continental plate. What will form above the subduction zone? __________________ a deep-ocean trench___________________________________________________________ 11. At a convergent boundary, a ...
... 10. At a convergent boundary of an oceanic and a continental plate, the oceanic plate will subduct under the continental plate. What will form above the subduction zone? __________________ a deep-ocean trench___________________________________________________________ 11. At a convergent boundary, a ...
Lesson Plan - GeographyPods
... *Read over information on p.34. Look at map at bottom of page. Explain that the earths crust is cracked LIKE AND EGGSHELL and that each section is called a PLATE. Where two plates meet is called a PLATE BOUNDARY (explain the word BOUNDARY e.g. cricket!!) *Students to go over the PLATE BOUNDARY LINE ...
... *Read over information on p.34. Look at map at bottom of page. Explain that the earths crust is cracked LIKE AND EGGSHELL and that each section is called a PLATE. Where two plates meet is called a PLATE BOUNDARY (explain the word BOUNDARY e.g. cricket!!) *Students to go over the PLATE BOUNDARY LINE ...
Continental Drift and Plate Tectonics
... Why was the idea of continental drift rejected for more than 40 years? Wegner could not provide the force that caused the continents to move. How could huge solid chunks of land have plowed through the ocean floor??? ...
... Why was the idea of continental drift rejected for more than 40 years? Wegner could not provide the force that caused the continents to move. How could huge solid chunks of land have plowed through the ocean floor??? ...
WHAT IS A PLATE? The surface of the Earth is broken up into large
... thought to be responsible for the movement of tectonic plates across the Earth’s surface. This theory is now largely out of favour, with modern imaging techniques unable to identify convection cells in the mantle sufficiently large to drive plate movement. Instead, it is thought to be caused by 'sla ...
... thought to be responsible for the movement of tectonic plates across the Earth’s surface. This theory is now largely out of favour, with modern imaging techniques unable to identify convection cells in the mantle sufficiently large to drive plate movement. Instead, it is thought to be caused by 'sla ...
Edible Plate Tectonics
... 4. Butterscotch chips will be used for volcanos in subduction zones. 5. Chocolate frosting will be used for volcanos at divergent boundaries and hot spots. 6. Students should position their materials to create their boundary, and then participate in a group or classroom discussion: In what ways does ...
... 4. Butterscotch chips will be used for volcanos in subduction zones. 5. Chocolate frosting will be used for volcanos at divergent boundaries and hot spots. 6. Students should position their materials to create their boundary, and then participate in a group or classroom discussion: In what ways does ...
Earth`s Interior Section 1
... that explains a wide range of observations. Pieces of Earth’s lithosphere are in constant, slow motion, driven by convection in the mantle. ...
... that explains a wide range of observations. Pieces of Earth’s lithosphere are in constant, slow motion, driven by convection in the mantle. ...
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.