Understanding Plate Motions - Maria Montessori Academy Blog
... very likely not since shortly after its formation 4.6 billion years ago. The Earth's unchanging size implies that the crust must be destroyed at about the same rate as it is being created. Such destruction (recycling) of crust takes place along convergent boundaries where plates are moving toward ...
... very likely not since shortly after its formation 4.6 billion years ago. The Earth's unchanging size implies that the crust must be destroyed at about the same rate as it is being created. Such destruction (recycling) of crust takes place along convergent boundaries where plates are moving toward ...
Name Hour Plate Tectonics Webquest I. Layers of the Earth 1. Go to
... “See what happens at different plate boundaries.” Move your mouse over the words on the diagram to learn more about the different types of boundaries. The first boundary picture is when an ocean crust collides with a continental crust. What type of landform is formed in this picture? _______________ ...
... “See what happens at different plate boundaries.” Move your mouse over the words on the diagram to learn more about the different types of boundaries. The first boundary picture is when an ocean crust collides with a continental crust. What type of landform is formed in this picture? _______________ ...
Exam 1
... Generally 2 to 3 sentences should be sufficient, though you can use more or less as you see fit. ...
... Generally 2 to 3 sentences should be sufficient, though you can use more or less as you see fit. ...
Topic 12 guided reading answer key
... 33. Approximately how much do the lithospheric plates move each year? A FEW CENTIMETERS A YEAR p.230 34. Study figure 12-3. What do these diagrams show us about the positions of the continents? THE CONTINENTS HAVE CHANGED POSITIONS THROUGHOUT HISTORY p.231 35. Define Divergent Plate Boundary: WHEN P ...
... 33. Approximately how much do the lithospheric plates move each year? A FEW CENTIMETERS A YEAR p.230 34. Study figure 12-3. What do these diagrams show us about the positions of the continents? THE CONTINENTS HAVE CHANGED POSITIONS THROUGHOUT HISTORY p.231 35. Define Divergent Plate Boundary: WHEN P ...
G2 - Igneous processes summary
... What is an ophilolite? .......................................................................................................... ...
... What is an ophilolite? .......................................................................................................... ...
The Theory of Plate Tectonics
... Earth’s lithosphere (the crust and the upper mantle) is broken into separate sections called plates. The plates fit closely together along cracks in the crust. They carry the continents, or parts of the ocean floor, or both. The geological theory of plate tectonics states that pieces of Earth’s lith ...
... Earth’s lithosphere (the crust and the upper mantle) is broken into separate sections called plates. The plates fit closely together along cracks in the crust. They carry the continents, or parts of the ocean floor, or both. The geological theory of plate tectonics states that pieces of Earth’s lith ...
Plate Tectonic
... The crust that is more dense dives (“sinks”) under the other one and returns to the mantle (this is called subduction). ...
... The crust that is more dense dives (“sinks”) under the other one and returns to the mantle (this is called subduction). ...
plate tectonic study guide
... more dense as it is pushed further to the sides and eventually sinks into a subduction zone. The old oceanic crust then goes to the asthenosphere where it melts and recycles back to the mid-ocean ridge. 22. Where do most faults occur? (at transform boundary- earthquakes) - a fault is a break in the ...
... more dense as it is pushed further to the sides and eventually sinks into a subduction zone. The old oceanic crust then goes to the asthenosphere where it melts and recycles back to the mid-ocean ridge. 22. Where do most faults occur? (at transform boundary- earthquakes) - a fault is a break in the ...
Earth`s Interior
... Heat is created by the radioactive decay and primordial energy (left over from Big Bang) ...
... Heat is created by the radioactive decay and primordial energy (left over from Big Bang) ...
Seafloor Spreading
... is broken into sections (plates) that move around the Asthenosphere. The Lithosphere is made up of the crust and part of the upper mantle. Plates can move together as Convergent Boundaries. Convection Currents are the energy in the mantle that forces magma up to the crust. Volcanoes and earthquakes ...
... is broken into sections (plates) that move around the Asthenosphere. The Lithosphere is made up of the crust and part of the upper mantle. Plates can move together as Convergent Boundaries. Convection Currents are the energy in the mantle that forces magma up to the crust. Volcanoes and earthquakes ...
plate tectonics
... As the plates move away from one another the pressure upon the asthenosphere is reduced causing the plastic-like asthenosphere material to turn into magma and rise into the gap which is created. This all happens at the rift valley. The lithosphere is made larger as the magma cools and hardens at the ...
... As the plates move away from one another the pressure upon the asthenosphere is reduced causing the plastic-like asthenosphere material to turn into magma and rise into the gap which is created. This all happens at the rift valley. The lithosphere is made larger as the magma cools and hardens at the ...
Plate Tectonics and Continental Drift
... b. Continental ____________rift valleys (East African Rift) (1) After widening of the rift, eventually the plates separate and seawater floods into the linear basin between the two divergent continents. (2) Eventually opens into an ocean with a midocean ridge in the center. ...
... b. Continental ____________rift valleys (East African Rift) (1) After widening of the rift, eventually the plates separate and seawater floods into the linear basin between the two divergent continents. (2) Eventually opens into an ocean with a midocean ridge in the center. ...
Plate Tectonics |Sample answer
... Plate Boundaries are zones where crust is both created and destroyed, examine the above statement with reference to examples you have studied (2007) There are three different types of plate boundaries. Divergent, Convergent and Transform Boundaries. Divergent boundaries occur when two plates are sep ...
... Plate Boundaries are zones where crust is both created and destroyed, examine the above statement with reference to examples you have studied (2007) There are three different types of plate boundaries. Divergent, Convergent and Transform Boundaries. Divergent boundaries occur when two plates are sep ...
Nacho-Tonics
... Convection- transfer of heat energy in a liquid very unequal (hot spots and cold areas develop that’s why you stir soups) ...
... Convection- transfer of heat energy in a liquid very unequal (hot spots and cold areas develop that’s why you stir soups) ...
Dec 2 Continental Drift (LT 1-2)
... Describe the process of seafloor spreading Explain at least three pieces of evidence for seafloor spreading ...
... Describe the process of seafloor spreading Explain at least three pieces of evidence for seafloor spreading ...
mantle drag
... material between upper and lower mantle) – Whole-mantle model: single cycle of convection reaches from the coremantle boundary to the base of the lithosphere. – Modern tomographic images argue for whole mantle convection ...
... material between upper and lower mantle) – Whole-mantle model: single cycle of convection reaches from the coremantle boundary to the base of the lithosphere. – Modern tomographic images argue for whole mantle convection ...
World Geog Ch 1_lesson2
... asthenosphere (orange in the figure). However they do not float freely. The plates are forced in specific directions by the flow of magma beneath. Just like a boat caught in a current plates move with the flow of magma. The magma forms convectional currents. The magma closer to the core heats and th ...
... asthenosphere (orange in the figure). However they do not float freely. The plates are forced in specific directions by the flow of magma beneath. Just like a boat caught in a current plates move with the flow of magma. The magma forms convectional currents. The magma closer to the core heats and th ...
Layers of the Earth Power Point
... The Earth's Crust is like the skin of an apple or the shell on an egg. It is very thin in comparison to the other three layers. The crust is only about 3-5 miles thick under the oceans (Oceanic Crust) and about 25 miles thick under the continents (Continental Crust). The CRUST is composed of two roc ...
... The Earth's Crust is like the skin of an apple or the shell on an egg. It is very thin in comparison to the other three layers. The crust is only about 3-5 miles thick under the oceans (Oceanic Crust) and about 25 miles thick under the continents (Continental Crust). The CRUST is composed of two roc ...
Chapter Review - Oakman School News
... away from the mid ocean ridge. Oceanic lithosphere is also higher at a mid-ocean ridge, so oceanic lithosphere moves down toward the subduction zone because of gravity. Answers will vary. The amount of crust formed is roughly equal to the amount of crust destroyed globally. If this were not true, th ...
... away from the mid ocean ridge. Oceanic lithosphere is also higher at a mid-ocean ridge, so oceanic lithosphere moves down toward the subduction zone because of gravity. Answers will vary. The amount of crust formed is roughly equal to the amount of crust destroyed globally. If this were not true, th ...
Earth`s Interior (What`s down there below us?)
... Of course, it’s not quite that simple: The “lithosphere” is the crust + part of the upper mantle. It is made of rock and is brittle. The “plates” of the earth’s crust make up the lithosphere. Below the lithosphere is a softer layer called the “asthenosphere”. In the asthenosphere, The rock is near ...
... Of course, it’s not quite that simple: The “lithosphere” is the crust + part of the upper mantle. It is made of rock and is brittle. The “plates” of the earth’s crust make up the lithosphere. Below the lithosphere is a softer layer called the “asthenosphere”. In the asthenosphere, The rock is near ...
Layers of the Earth
... 1,000 degrees C to 3,700 degrees C. Similar to the crust, but has more magnesium. ...
... 1,000 degrees C to 3,700 degrees C. Similar to the crust, but has more magnesium. ...
inner core
... constantly changes is called theory of plate tectonic. • The theory states that the earth’s outer shell, the lithosphere is divided into eight large plates. • Because each plate moves as a single unit, the interiors of the plates are generally stable. • All major activity such as ...
... constantly changes is called theory of plate tectonic. • The theory states that the earth’s outer shell, the lithosphere is divided into eight large plates. • Because each plate moves as a single unit, the interiors of the plates are generally stable. • All major activity such as ...
Part B - Bakersfield College
... • thinner and more dense plate subducts • subducted plates melt (160 km) below the surface, and magma rises • EQ’s occur along the subduction zone, and magma plumes rise • typically, the older plate will subduct (more dense) beneath younger plate material ...
... • thinner and more dense plate subducts • subducted plates melt (160 km) below the surface, and magma rises • EQ’s occur along the subduction zone, and magma plumes rise • typically, the older plate will subduct (more dense) beneath younger plate material ...
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.