Chapter 3 – The Dynamic Earth Section 1: The Geosphere
... • Consists of densest elements • Radius approximately 3400 km ...
... • Consists of densest elements • Radius approximately 3400 km ...
Structure of the Earth Lithosphere System In this lecture we will learn
... The lithosphere consists of the oceanic crust, continental crust, and uppermost mantle. Beneath the lithosphere is the asthenosphere. This layer, which is also part of the upper mantle, extends to a depth of about 200 kilometers. Sedimentary deposits are commonly found at the boundaries between the ...
... The lithosphere consists of the oceanic crust, continental crust, and uppermost mantle. Beneath the lithosphere is the asthenosphere. This layer, which is also part of the upper mantle, extends to a depth of about 200 kilometers. Sedimentary deposits are commonly found at the boundaries between the ...
Napoleon - Kawameeh Middle School
... These are the two types of evidence that scientists have used to support the theory of plate tectonics. ...
... These are the two types of evidence that scientists have used to support the theory of plate tectonics. ...
Plate Tectonics/Earthquakes/Volcanoes Study Guide
... Composite (stratovolcanoes): most ________________________________________ that form by explosive eruptions of pyroclastic material followed by quieter outpourings of lava. (wide base, gets steeper towards the top) Types of Volcanoes Picture ...
... Composite (stratovolcanoes): most ________________________________________ that form by explosive eruptions of pyroclastic material followed by quieter outpourings of lava. (wide base, gets steeper towards the top) Types of Volcanoes Picture ...
1. What analogy (comparison between two things) does
... 5. Scientists predict that in another 250 million years, the continents will be located in different positions. How is this possible? A. The tectonic plates on Earth are continually moving at a slow rate. B. The gravity on Earth causes the continents to move around. C. Scientist think that the conti ...
... 5. Scientists predict that in another 250 million years, the continents will be located in different positions. How is this possible? A. The tectonic plates on Earth are continually moving at a slow rate. B. The gravity on Earth causes the continents to move around. C. Scientist think that the conti ...
Lithospheric Plates
... Zones where lithospheric plates move alongside one another No oceanic lithosphere is created or destroyed (sometimes called “strikeslip” boundaries) ...
... Zones where lithospheric plates move alongside one another No oceanic lithosphere is created or destroyed (sometimes called “strikeslip” boundaries) ...
Seafloor Spreading.pps
... Zones where lithospheric plates move alongside one another No oceanic lithosphere is created or destroyed (sometimes called “strikeslip” boundaries) ...
... Zones where lithospheric plates move alongside one another No oceanic lithosphere is created or destroyed (sometimes called “strikeslip” boundaries) ...
Plate Tectonics
... The plate that goes under will begin to melt as it approaches the mantle. This new hot molten rock will rise and if it breaks through the lithosphere it will create a volcano. It is important to note that since part of the lithosphere is being lost at this point, there must be some other point on th ...
... The plate that goes under will begin to melt as it approaches the mantle. This new hot molten rock will rise and if it breaks through the lithosphere it will create a volcano. It is important to note that since part of the lithosphere is being lost at this point, there must be some other point on th ...
crust
... Wegener proposed that all of the separate continents that we see today were once connected in a giant landmass called Pangaea which broke up about 180 M years ago and formed 2 big pieces called Laurasia and Gondwanaland. Then, about 65 MYA, these broke up and formed the continents that we know toda ...
... Wegener proposed that all of the separate continents that we see today were once connected in a giant landmass called Pangaea which broke up about 180 M years ago and formed 2 big pieces called Laurasia and Gondwanaland. Then, about 65 MYA, these broke up and formed the continents that we know toda ...
Restless Continents
... • Wegener’s hypothesis was rejected at first • Scientists rejected it because from the calculated strength of rocks it did not seem possible for the crust to move this way. • It was not until many years after Wegener’s death that evidence provided clues that forces moved the continents. ...
... • Wegener’s hypothesis was rejected at first • Scientists rejected it because from the calculated strength of rocks it did not seem possible for the crust to move this way. • It was not until many years after Wegener’s death that evidence provided clues that forces moved the continents. ...
3.1_structure_of_the_earth
... and go to a depth of roughly 10 kilometres. The thickest parts are the continents (CONTINENTAL CRUST) which extend down to 35 kilometres on average. The continental crust in the Himalayas is some 75 kilometres deep. The mantle is the layer beneath the crust which extends about half way to the centre ...
... and go to a depth of roughly 10 kilometres. The thickest parts are the continents (CONTINENTAL CRUST) which extend down to 35 kilometres on average. The continental crust in the Himalayas is some 75 kilometres deep. The mantle is the layer beneath the crust which extends about half way to the centre ...
File
... • As the plates move, collide, or pull apart…it produces GREAT changes on Earth’s surface ...
... • As the plates move, collide, or pull apart…it produces GREAT changes on Earth’s surface ...
Science In Action 7 Planet Earth Section Quiz Section 3 – Landforms
... 1. Alfred Wegner determined that the continents at one time all fit together to form one large supercontinent, called Pangaea. Their interlocking shapes and other evidence helped him form the Theory of Continental Drift. The other evidence included all of the following, except ...
... 1. Alfred Wegner determined that the continents at one time all fit together to form one large supercontinent, called Pangaea. Their interlocking shapes and other evidence helped him form the Theory of Continental Drift. The other evidence included all of the following, except ...
What do Earth`s layers consist of?
... • As the plates move, collide, or pull apart…it produces GREAT changes on Earth’s surface ...
... • As the plates move, collide, or pull apart…it produces GREAT changes on Earth’s surface ...
Section 1: Earth`s Interior (pages 16 – 24)
... - Plate tectonics is the geological theory that pieces of Earth’s lithosphere (PLATES) are in constant, slow motion, driven by convection currents in the mantle. - Plate tectonics explains the formation, movement, and subduction of Earth’s plates. - As the plates move, they collide, pull apart, or g ...
... - Plate tectonics is the geological theory that pieces of Earth’s lithosphere (PLATES) are in constant, slow motion, driven by convection currents in the mantle. - Plate tectonics explains the formation, movement, and subduction of Earth’s plates. - As the plates move, they collide, pull apart, or g ...
Presentation 5
... What does the theory of plate tectonics state? What force is great enough to move Earth's heavy plates? What happens as the plates move? What do these changes in the Earth's surface ...
... What does the theory of plate tectonics state? What force is great enough to move Earth's heavy plates? What happens as the plates move? What do these changes in the Earth's surface ...
plate_tectonics
... Mantle (continued) b. convection current (cc) – flow that transfers heat within a fluid. i. heating and cooling of fluid, changes in density, and force of gravity cause convection currents (cc). c. (CC) occur within the asthenosphere creating movement ...
... Mantle (continued) b. convection current (cc) – flow that transfers heat within a fluid. i. heating and cooling of fluid, changes in density, and force of gravity cause convection currents (cc). c. (CC) occur within the asthenosphere creating movement ...
Changes Within the Earth
... • Scientist Alfred Wegener created the theory of “Pangaea” started 180 million years ago. 1 land mass breaks off into the 7 current continents. • Scientists developed the theory of plate tectonics. These are plates of the earth’s crust that are constantly moving at a slow pace and creating pressure ...
... • Scientist Alfred Wegener created the theory of “Pangaea” started 180 million years ago. 1 land mass breaks off into the 7 current continents. • Scientists developed the theory of plate tectonics. These are plates of the earth’s crust that are constantly moving at a slow pace and creating pressure ...
Plate Tectonics
... • Sampled rocks on both sides of spreading • Found magnetic stripes based on magnetic fields that were identical ...
... • Sampled rocks on both sides of spreading • Found magnetic stripes based on magnetic fields that were identical ...
Plate Tectonics
... • The word tectonics comes from the Greek root “to build”. • The Earths surface is built of plates. • The theory of plate tectonics states that the Earths outermost layer is fragmented into twelve or more large and small plates that are moving relative to one another as they ride atop a hotter, more ...
... • The word tectonics comes from the Greek root “to build”. • The Earths surface is built of plates. • The theory of plate tectonics states that the Earths outermost layer is fragmented into twelve or more large and small plates that are moving relative to one another as they ride atop a hotter, more ...
Document
... how rocks are classified the difference between weathering and erosion what fossils tell us about our Earth how we know the plates are still moving – evidence on Earth’s surface ...
... how rocks are classified the difference between weathering and erosion what fossils tell us about our Earth how we know the plates are still moving – evidence on Earth’s surface ...
The stability of the continents and the tendency for old oceanic
... (c) Calculate the average density of the oceanic plate from the two densities you determined in part (b), bearing in mind the relative thicknesses of the crust and lithospheric mantle. 2. Now calculate the average density of a continental plate by repeating the procedure in part (1). 3. Thirdly ...
... (c) Calculate the average density of the oceanic plate from the two densities you determined in part (b), bearing in mind the relative thicknesses of the crust and lithospheric mantle. 2. Now calculate the average density of a continental plate by repeating the procedure in part (1). 3. Thirdly ...
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.