Short Answer Essay Questions
... there would have been more than one in the past, though this would have been required to explain the different polar wander paths of the different continents. The only other possible explanation is that the continents were once joined and have since moved apart. [p. 36] 9. What evidence is there tha ...
... there would have been more than one in the past, though this would have been required to explain the different polar wander paths of the different continents. The only other possible explanation is that the continents were once joined and have since moved apart. [p. 36] 9. What evidence is there tha ...
Oceanography Chapter 1
... solely from the Earth. There is evidence that energy from the Earth's accumulation caused the surface to be molten. Further, the processes of erosion and crustal recycling have apparently destroyed all of the earliest surface. • The oldest rocks which have been found so far (on the Earth) date to ab ...
... solely from the Earth. There is evidence that energy from the Earth's accumulation caused the surface to be molten. Further, the processes of erosion and crustal recycling have apparently destroyed all of the earliest surface. • The oldest rocks which have been found so far (on the Earth) date to ab ...
Quiz Maker - Geneva 304
... 11. What is the theory of plate tectonics and what is thought to be the driving force of plate tectonics? Where are most of the changes (volcanoes, earthquakes, etc.) on the Earth’s surface occurring? 12. Describe and diagram a divergent plate boundary. In your diagram, label the asthenosphere, the ...
... 11. What is the theory of plate tectonics and what is thought to be the driving force of plate tectonics? Where are most of the changes (volcanoes, earthquakes, etc.) on the Earth’s surface occurring? 12. Describe and diagram a divergent plate boundary. In your diagram, label the asthenosphere, the ...
Earth Inside Out Sculpting the
... this enormous blob could be shoving Africa skyward. Because the blob is a region where seismic waves are sluggish, they assumed that it was hotter than the surrounding mantle. The basic physics of convection suggested that a hot blob was likely to be rising. But a seismic snapshot records only a sin ...
... this enormous blob could be shoving Africa skyward. Because the blob is a region where seismic waves are sluggish, they assumed that it was hotter than the surrounding mantle. The basic physics of convection suggested that a hot blob was likely to be rising. But a seismic snapshot records only a sin ...
come and visit carlow`s very own volcano
... north of Kilcarry Bridge. It formed from very hot magma which welled upwards from depth along fractures in the Earth’s crust. As it cooled a series of veins formed in its margins – and a small percentage have potential resources of lithium and tantalum, both essential to power our mobile phones. The ...
... north of Kilcarry Bridge. It formed from very hot magma which welled upwards from depth along fractures in the Earth’s crust. As it cooled a series of veins formed in its margins – and a small percentage have potential resources of lithium and tantalum, both essential to power our mobile phones. The ...
Jon D - Laconia School District
... move at extremely slow rates. They move from convection. Convection is when something is hot it rises and then when it cools it will sink. When the mantle is moving from convection it pulls the lithosphere with it and that causes that plates to move. The plates move at about the same rate that your ...
... move at extremely slow rates. They move from convection. Convection is when something is hot it rises and then when it cools it will sink. When the mantle is moving from convection it pulls the lithosphere with it and that causes that plates to move. The plates move at about the same rate that your ...
Delamination, Slab Break-Off, and Slab Roll-Back
... • Subducting slab sweeps back through the mantle like a paddle • Hinge migrates away from the arc region • Upper plate is pulled along and may lead to back-arc spreading • Causes/Effects – Gravity – Forces – Asthenosphere upwelling ...
... • Subducting slab sweeps back through the mantle like a paddle • Hinge migrates away from the arc region • Upper plate is pulled along and may lead to back-arc spreading • Causes/Effects – Gravity – Forces – Asthenosphere upwelling ...
WS5: Continental Drift
... New evidence for magnetic drift was discovered in the 1950s from studies of Earth’s magnetic history. Earth has a magnetic field like that of a bar magnet, with magnetic north and south poles. The magnetic poles are located near the geographic poles. In the 1950s, scientists studied the magnetic pro ...
... New evidence for magnetic drift was discovered in the 1950s from studies of Earth’s magnetic history. Earth has a magnetic field like that of a bar magnet, with magnetic north and south poles. The magnetic poles are located near the geographic poles. In the 1950s, scientists studied the magnetic pro ...
Lesson Plans for Bobby Mochman, Baker 6th Grade
... Earth by constructing a model of Earth's interior layers to illustrate the inner/outer core, upper/lower mantle, crust, asthenosphere, lithosphere, and crust. ...
... Earth by constructing a model of Earth's interior layers to illustrate the inner/outer core, upper/lower mantle, crust, asthenosphere, lithosphere, and crust. ...
Mantle Convection and Structure
... large (10%) extent of melting at shallow depth. Depleted in incompatible elements (including K, U, Th) - probably as a result of earlier melting episodes. Isotope ratios indicate ancient depletion. ...
... large (10%) extent of melting at shallow depth. Depleted in incompatible elements (including K, U, Th) - probably as a result of earlier melting episodes. Isotope ratios indicate ancient depletion. ...
FCAT Review - Mrs. Shaw's Science Site
... 3 kinds of stress can occur in the crust: • 1)Tension- the stress force that pulls on the crust and thins rock in the middle. Occurs where 2 plates pull apart. • 2) Compression- the stress force that squeezes rock until it folds or breaks. This occurs where 2 plates come together. • 3) Shearing- str ...
... 3 kinds of stress can occur in the crust: • 1)Tension- the stress force that pulls on the crust and thins rock in the middle. Occurs where 2 plates pull apart. • 2) Compression- the stress force that squeezes rock until it folds or breaks. This occurs where 2 plates come together. • 3) Shearing- str ...
Brainpop - Tsunami
... b. the destructiveness of natural disasters c. underwater energy d. seismic activity _____ 8. Which of the following statements is an opinion about tsunamis? a. The 2004 tsunami caused millions of ...
... b. the destructiveness of natural disasters c. underwater energy d. seismic activity _____ 8. Which of the following statements is an opinion about tsunamis? a. The 2004 tsunami caused millions of ...
File
... a. They break. b. They deform. c. They sink lower. d. They return to their original elevation. Subsidence of Cooler Rocks ...
... a. They break. b. They deform. c. They sink lower. d. They return to their original elevation. Subsidence of Cooler Rocks ...
Non-Renewable Mineral Resources
... Core: innermost zone with solid inner core and molten outer core that is extremely hot. Mantle: solid rock with a rigid outer part (asthenosphere) that is melted pliable rock. Crust: Outermost zone which underlies the ...
... Core: innermost zone with solid inner core and molten outer core that is extremely hot. Mantle: solid rock with a rigid outer part (asthenosphere) that is melted pliable rock. Crust: Outermost zone which underlies the ...
599KB - NZQA
... role of water in producing explosive eruptions due to lowered melting point of crust material. • Gives a comprehensive explanation that a dacite eruption would contain a higher percentage of overlying (AP) crust. ...
... role of water in producing explosive eruptions due to lowered melting point of crust material. • Gives a comprehensive explanation that a dacite eruption would contain a higher percentage of overlying (AP) crust. ...
244KB - NZQA
... role of water in producing explosive eruptions due to lowered melting point of crust material. • Gives a comprehensive explanation that a dacite eruption would contain a higher percentage of overlying (AP) crust. ...
... role of water in producing explosive eruptions due to lowered melting point of crust material. • Gives a comprehensive explanation that a dacite eruption would contain a higher percentage of overlying (AP) crust. ...
Mantle Convection and Plate Tectonics: Toward an Integrated
... develop pure transform boundaries. Instead, every boundary has a mixture of divergence and transform motion. Although these advances are encouraging, the plates are not Earth-like. They have unrealistically broad plate boundaries, subduction that is symmetric (whereas on Earth one plate slides under ...
... develop pure transform boundaries. Instead, every boundary has a mixture of divergence and transform motion. Although these advances are encouraging, the plates are not Earth-like. They have unrealistically broad plate boundaries, subduction that is symmetric (whereas on Earth one plate slides under ...
History of Ocean Basins
... T h e proposed single-cell overturn brought about the bilateral asymmetry of the Earth, now possibly much modified but still evident in its land and water hemispheres. After this event, which segregated the core from the mantle, single-cell convection was no longer possible i n the Earth as a whole ...
... T h e proposed single-cell overturn brought about the bilateral asymmetry of the Earth, now possibly much modified but still evident in its land and water hemispheres. After this event, which segregated the core from the mantle, single-cell convection was no longer possible i n the Earth as a whole ...
Geologic Evolution of Point Lobos
... Figure 5. “Transform faults” and “fracture zones are giant cracks in the earth’s crust. In the ocean basins, oceanic ridges are commonly displaced by transform faults. The ridges are not necessarily moving apart, but the crust on opposite sides of the fracture may be moving in opposite directions or ...
... Figure 5. “Transform faults” and “fracture zones are giant cracks in the earth’s crust. In the ocean basins, oceanic ridges are commonly displaced by transform faults. The ridges are not necessarily moving apart, but the crust on opposite sides of the fracture may be moving in opposite directions or ...
Isotopic Evolucon of the Earth (II)
... If bulk Earth is chondri-c, average composi-on must lie on Geochron Most accessible Earth reservoirs have Pb isotope composi-ons which lie to radiogenic side of the Geochron ?Hidden reservoir with unradiogenic Pb (core, or core‐mantle boundary) Or oceanic basalts do not faithfully record source ...
... If bulk Earth is chondri-c, average composi-on must lie on Geochron Most accessible Earth reservoirs have Pb isotope composi-ons which lie to radiogenic side of the Geochron ?Hidden reservoir with unradiogenic Pb (core, or core‐mantle boundary) Or oceanic basalts do not faithfully record source ...
Seafloor Spreading Hypothesis
... Hess could also use seafloor spreading to explain the flat topped guyots. He suggested that they were once active volcanoes that were exposed to erosion above sea level. As the seafloor they sat on moved away from the ridge, the crust on which they sat become less buoyant and the guyots moved deeper ...
... Hess could also use seafloor spreading to explain the flat topped guyots. He suggested that they were once active volcanoes that were exposed to erosion above sea level. As the seafloor they sat on moved away from the ridge, the crust on which they sat become less buoyant and the guyots moved deeper ...
Get Up and Go
... What is a tsunami? It is not an ordinary wave. Wind and tides are the source, or cause, of most ocean waves. When wind blows along the top of the ocean, it causes waves. The tides cause the ocean waves to move, pulling water toward the shore, and then pulling it away. This causes waves, too. A tsuna ...
... What is a tsunami? It is not an ordinary wave. Wind and tides are the source, or cause, of most ocean waves. When wind blows along the top of the ocean, it causes waves. The tides cause the ocean waves to move, pulling water toward the shore, and then pulling it away. This causes waves, too. A tsuna ...
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.