The Layer`s Of The Earth!
... The Mantle • It is composed of mostly iron, magnesium and silicon. • The mantle accounts for about 70% of the Earth’s mass • It is divided into two regions: the upper and ...
... The Mantle • It is composed of mostly iron, magnesium and silicon. • The mantle accounts for about 70% of the Earth’s mass • It is divided into two regions: the upper and ...
The Earth’s Layers - Welcome to Ms. George's Science Class
... mantle. • With present technology, we can’t drill far enough through the crust to get to the mantle. • So how do scientists “know” about the mantle? • They observe places where mantle rock pushes close to the Earth’s surface, such as where lava pours out of active volcanoes on the ocean floor. ...
... mantle. • With present technology, we can’t drill far enough through the crust to get to the mantle. • So how do scientists “know” about the mantle? • They observe places where mantle rock pushes close to the Earth’s surface, such as where lava pours out of active volcanoes on the ocean floor. ...
Earth`s Interior
... The Earth can be compared to a hard-boiled egg. Its major layers (crust, mantle, core) are like the shell, egg-white and yolk of an egg. The deepest man has dug into the Earth is 5 km in the South African gold mines. (This is within the crust.) Here the temperature increases by 10 to 15 ˚C for ever ...
... The Earth can be compared to a hard-boiled egg. Its major layers (crust, mantle, core) are like the shell, egg-white and yolk of an egg. The deepest man has dug into the Earth is 5 km in the South African gold mines. (This is within the crust.) Here the temperature increases by 10 to 15 ˚C for ever ...
The Earth
... Dating and the Magnetic Field • Rocks forming at the ridge crest record the magnetic field existing at the time (and place) when they solidify. • Sea floor increases in age and is more deeply buried by sediment away from the ridge because sediments have had a longer time to collect. • It also gets ...
... Dating and the Magnetic Field • Rocks forming at the ridge crest record the magnetic field existing at the time (and place) when they solidify. • Sea floor increases in age and is more deeply buried by sediment away from the ridge because sediments have had a longer time to collect. • It also gets ...
Continental Drift and Sea Floor Spreading
... • Although his explanations for the reason the continents drifted were incorrect there was still convincing evidence that they were indeed once together. ...
... • Although his explanations for the reason the continents drifted were incorrect there was still convincing evidence that they were indeed once together. ...
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... earth is made up of big pieces. The pieces are called tectonic plates. These plates can move apart or crash into each other. One tectonic plate can slip over or under another one. When the plates move, the land shakes. The earth can crack or change shape. ...
... earth is made up of big pieces. The pieces are called tectonic plates. These plates can move apart or crash into each other. One tectonic plate can slip over or under another one. When the plates move, the land shakes. The earth can crack or change shape. ...
8_Plate_Tectonics_n_Layers_of_the_Earth
... *Pangaea – when Wegener placed all the continents together like a puzzle, it formed a large landmass which he called Pangae ...
... *Pangaea – when Wegener placed all the continents together like a puzzle, it formed a large landmass which he called Pangae ...
Handout 2.3-2 Standard 2 Objective 3.a, b, d, and e
... 10. Why did the subduction of the oceanic lithosphere of the Indian plate stop when the continental lithosphere of India collided with the continental lithosphere of Eurasia, and what happened to the Himalayas? ...
... 10. Why did the subduction of the oceanic lithosphere of the Indian plate stop when the continental lithosphere of India collided with the continental lithosphere of Eurasia, and what happened to the Himalayas? ...
Exam I Review Q`s
... Why does the mantle transmit seismic waves but does not generate earthquakes? If the mantle does not generate earthquakes, why are the deepest recorded quakes as deep as 700 km? What is a Wadati-Benioff zone? What is a Richter magnitude for an earthquake? What is the global distribution of earthqua ...
... Why does the mantle transmit seismic waves but does not generate earthquakes? If the mantle does not generate earthquakes, why are the deepest recorded quakes as deep as 700 km? What is a Wadati-Benioff zone? What is a Richter magnitude for an earthquake? What is the global distribution of earthqua ...
Plate Tectonics Theory
... Theory of Plate Tectonics: refers to how the Earth's surface is built of a dozen or more large and small plates. The plates are moving relative to one another as they ride atop hotter, more mobile material ...
... Theory of Plate Tectonics: refers to how the Earth's surface is built of a dozen or more large and small plates. The plates are moving relative to one another as they ride atop hotter, more mobile material ...
Ch. 11 Lecture1
... Earth's crust. George Bedell Airy proposed that the density of the crust is everywhere the same and the thickness of crustal material varies. Higher mountains are compensated by deeper roots. This explains the high elevations of most major mountain chains, such as the Himalayas. G H Pratt hypothesiz ...
... Earth's crust. George Bedell Airy proposed that the density of the crust is everywhere the same and the thickness of crustal material varies. Higher mountains are compensated by deeper roots. This explains the high elevations of most major mountain chains, such as the Himalayas. G H Pratt hypothesiz ...
Plate Tectonics - NewPath Learning
... he could not explain how continental drift occurred. A number of discoveries throughout the 20th century led to a completely new theory, known as plate tectonics. This theory was first proposed in the early 1960’s. As explained above, one piece of the theory is sea-floor spreading. This explains how ...
... he could not explain how continental drift occurred. A number of discoveries throughout the 20th century led to a completely new theory, known as plate tectonics. This theory was first proposed in the early 1960’s. As explained above, one piece of the theory is sea-floor spreading. This explains how ...
Geography and Landforms Graffiti
... a theory first proposed by scientist Alfred Wegener in 1912. Wegener didn't have an explanation for how continents could move around the planet, but researchers do now. Plate tectonics is the unifying theory of geology, said Nicholas van der Elst, a seismologist at Columbia University's Lamont-Doher ...
... a theory first proposed by scientist Alfred Wegener in 1912. Wegener didn't have an explanation for how continents could move around the planet, but researchers do now. Plate tectonics is the unifying theory of geology, said Nicholas van der Elst, a seismologist at Columbia University's Lamont-Doher ...
Dynamic Ocean Floor
... • Two plates move away from one another. • This is a zone of weakness. • As two plates move apart at the mid-ocean ridges, magma from the mantle up wells through a crack in the oceanic crust and cooled by the sea creating new ocean floor. • Energy is released in the form of earthquakes. • Shallow fo ...
... • Two plates move away from one another. • This is a zone of weakness. • As two plates move apart at the mid-ocean ridges, magma from the mantle up wells through a crack in the oceanic crust and cooled by the sea creating new ocean floor. • Energy is released in the form of earthquakes. • Shallow fo ...
this document
... Most of the Earth’s volcanoes are found at the boundaries of plates. But a few volcanoes are found, surprisingly, in the center of the plates. Such volcanoes are thought to be caused by “hot spots” located deep within the Earth – perhaps in the lower parts of the mantle or even in the core itself. S ...
... Most of the Earth’s volcanoes are found at the boundaries of plates. But a few volcanoes are found, surprisingly, in the center of the plates. Such volcanoes are thought to be caused by “hot spots” located deep within the Earth – perhaps in the lower parts of the mantle or even in the core itself. S ...
Basic Structure of the Earth
... Layers Defined by Composition Crust • Continental crust - Upper crust composed of granitic rocks - Lower crust is more akin to basalt - Average density is about 2.7 g/cm3 - Up to 4 billion years old ...
... Layers Defined by Composition Crust • Continental crust - Upper crust composed of granitic rocks - Lower crust is more akin to basalt - Average density is about 2.7 g/cm3 - Up to 4 billion years old ...
mid-ocean ridge
... The Theory of Plate Tectonics • Scientists combined what they knew about sea-floor spreading, Earth’s plates, and plate motions into a theory called plate tectonics . The theory of plate tectonics states that Earth’s plates are in slow, constant motion, driven by convection currents in the mantle. ...
... The Theory of Plate Tectonics • Scientists combined what they knew about sea-floor spreading, Earth’s plates, and plate motions into a theory called plate tectonics . The theory of plate tectonics states that Earth’s plates are in slow, constant motion, driven by convection currents in the mantle. ...
Earth`s Layers
... is very thin compared to the other three layers. *The crust makes up 1% of the Earth. * The crust of the Earth is ...
... is very thin compared to the other three layers. *The crust makes up 1% of the Earth. * The crust of the Earth is ...
Ch. 11 Earthquakes
... quakes strength based on size of area the fault moves, the average distance that the fault blocks move, and the rigidity of the rocks in the fault zone. Mercalli scale – expresses the intensity of an earthquake or the amount of damage it causes. Expressed by a roman numeral and a ...
... quakes strength based on size of area the fault moves, the average distance that the fault blocks move, and the rigidity of the rocks in the fault zone. Mercalli scale – expresses the intensity of an earthquake or the amount of damage it causes. Expressed by a roman numeral and a ...
PRACTICE Test: Earth Science INSTRUCTIONS - Ms
... K. the sudden release of built-up stress in the ground ...
... K. the sudden release of built-up stress in the ground ...
Plate Tectonics and the Earth`s Interior
... divides Atlantic Ocean into two equal parts At sea level, forms Iceland ...
... divides Atlantic Ocean into two equal parts At sea level, forms Iceland ...
MovingPlates
... the mid-ocean ridge show a banded pattern of polarity reversals in the Earth’s magnetic field. The rocks closets to the ridge are the youngest and the rocks farthest away are the oldest. The age of the rocks near the coasts of N. America and Europe show that they formed 200 million years ago-jus ...
... the mid-ocean ridge show a banded pattern of polarity reversals in the Earth’s magnetic field. The rocks closets to the ridge are the youngest and the rocks farthest away are the oldest. The age of the rocks near the coasts of N. America and Europe show that they formed 200 million years ago-jus ...
earth`s components & characteristics
... • Magma comes to surface & cools, creating crust • Usually in oceans, but can occur in continents (Africa’s Rift Valley) • Creates mid-ocean ridges • EX: Mid-Atlantic Ridge created when N.American plate pulls away from Eurasian plate. ...
... • Magma comes to surface & cools, creating crust • Usually in oceans, but can occur in continents (Africa’s Rift Valley) • Creates mid-ocean ridges • EX: Mid-Atlantic Ridge created when N.American plate pulls away from Eurasian plate. ...
Post-glacial rebound
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Post-glacial rebound (sometimes called continental rebound) is the rise of land masses that were depressed by the huge weight of ice sheets during the last glacial period, through a process known as isostatic depression. Post-glacial rebound and isostatic depression are different parts of a process known as either glacial isostasy, glacial isostatic adjustment, or glacioisostasy. Glacioisostasy is the solid Earth deformation associated with changes in ice mass distribution. The most obvious and direct affects of post-glacial rebound are readily apparent in northern Europe (especially Scotland, Estonia, Latvia, Fennoscandia, and northern Denmark), Siberia, Canada, the Great Lakes of Canada and the United States, the coastal region of the US state of Maine, parts of Patagonia, and Antarctica. However, through processes known as ocean siphoning and continental levering, the effects of post-glacial rebound on sea-level are felt globally far from the locations of current and former ice sheets.