plate tectonics
... the crest of ridges represent divergent plate boundaries. • Rift valleys are deep faulted structures found along the axes of divergent plate boundaries. They can develop on the seafloor or on land. • Seafloor spreading produces new oceanic lithosphere. ...
... the crest of ridges represent divergent plate boundaries. • Rift valleys are deep faulted structures found along the axes of divergent plate boundaries. They can develop on the seafloor or on land. • Seafloor spreading produces new oceanic lithosphere. ...
Driving Forces- Plate Movement Transcript
... ..Conduction is a form of heat transfer by which particles of matter have direct contact with one another. The third type of heat transfer is ..Convection is heat transfer by the movement of heated liquid. This method is the heat transfer method this lesson will focus on. Slide 5: Plate Movement ..S ...
... ..Conduction is a form of heat transfer by which particles of matter have direct contact with one another. The third type of heat transfer is ..Convection is heat transfer by the movement of heated liquid. This method is the heat transfer method this lesson will focus on. Slide 5: Plate Movement ..S ...
English - Fabio Crameri
... layer of air. After a period of about 10 million years, which is short on a geological timescale, an asymmetrical unilateral subduction had already developed in the model with the layer of air. The model realistically replicates the deformation experienced by the subducting plate in this process, an ...
... layer of air. After a period of about 10 million years, which is short on a geological timescale, an asymmetrical unilateral subduction had already developed in the model with the layer of air. The model realistically replicates the deformation experienced by the subducting plate in this process, an ...
Our Dynamic Earth
... Geologist- a scientist who examines rocks to find out about Earth’s history and structure. ...
... Geologist- a scientist who examines rocks to find out about Earth’s history and structure. ...
Powerpoint Presentation Physical Geology, 10th ed.
... volcanoes, fault zones and mountain belts ...
... volcanoes, fault zones and mountain belts ...
RM 1 Snack Tectonics Lab Sheet
... 1. Remove one of the fruit roll-ups from the model. 2. Place one graham cracker lightly onto the asthenosphere next to the remaining fruit roll-up piece. (Because the continental crust is less dense, it floats on the asthenosphere). ...
... 1. Remove one of the fruit roll-ups from the model. 2. Place one graham cracker lightly onto the asthenosphere next to the remaining fruit roll-up piece. (Because the continental crust is less dense, it floats on the asthenosphere). ...
Tectonic Landforms
... • Anomaly = The East Pacific Ridge This is down to the position of convection cell currents in the asthenosphere producing rising and diverging limbs at that particular ...
... • Anomaly = The East Pacific Ridge This is down to the position of convection cell currents in the asthenosphere producing rising and diverging limbs at that particular ...
Chapter 7 and 8 Test Review
... The rocks stretch and bend The rocks stretch beyond their elastic limit The rocks snap, releasing energy ...
... The rocks stretch and bend The rocks stretch beyond their elastic limit The rocks snap, releasing energy ...
EarthInterior_LAYERS
... The continental crust is mostly granite. -The oceanic crust is basalt. Basalt is much denser than the granite. -Because of this the less dense continents ride on the denser oceanic plates. ...
... The continental crust is mostly granite. -The oceanic crust is basalt. Basalt is much denser than the granite. -Because of this the less dense continents ride on the denser oceanic plates. ...
Presentation
... The Earth's Crust is like the skin of an apple. It is made of solid rock. The crust is only about 3-5 miles (8 kilometers) thick under the oceans and about 25 miles (32 kilometers) thick under the continents The temperatures of the crust vary from air temperature on top to about 1600 degrees F in th ...
... The Earth's Crust is like the skin of an apple. It is made of solid rock. The crust is only about 3-5 miles (8 kilometers) thick under the oceans and about 25 miles (32 kilometers) thick under the continents The temperatures of the crust vary from air temperature on top to about 1600 degrees F in th ...
Introduction to Geography
... Introduction to Geography By Arthur Getis Judith Getis Jerome D. Fellmann ...
... Introduction to Geography By Arthur Getis Judith Getis Jerome D. Fellmann ...
Theory of Plate Tectonics As you may have discovered, Earth is not
... apart, forming new crust along one plate edge, the crust on another edge of the plate is slowly forced back down into Earth’s mantle where it becomes molten rock again. This type of area, known as a subduction zone, forms when continental land masses collide with ocean plates or when two ocean plate ...
... apart, forming new crust along one plate edge, the crust on another edge of the plate is slowly forced back down into Earth’s mantle where it becomes molten rock again. This type of area, known as a subduction zone, forms when continental land masses collide with ocean plates or when two ocean plate ...
PHYSICAL GEOLOGY OF CANADA
... named Alfred Wegener first proposed the Theory of Continental Drift in ...
... named Alfred Wegener first proposed the Theory of Continental Drift in ...
8.4: Plates converge or scrape past each other
... Changed scientists view of Earth: the lithosphere has been in motion for millions of years…and can help predict what may happen in the future Eastern U.S: the deformed and folded rocks in the Appalachian Mountains are evidence of an ancient convergent boundary These rocks are the same as those ...
... Changed scientists view of Earth: the lithosphere has been in motion for millions of years…and can help predict what may happen in the future Eastern U.S: the deformed and folded rocks in the Appalachian Mountains are evidence of an ancient convergent boundary These rocks are the same as those ...
The Physical world
... another.—Think of an egg! • Core – solid metallic center made of nickel and iron • Mantle – soft layer of molten rock (magma) • Crust – thin layer of rock on earth’s surface ...
... another.—Think of an egg! • Core – solid metallic center made of nickel and iron • Mantle – soft layer of molten rock (magma) • Crust – thin layer of rock on earth’s surface ...
KICKS Plate Tectonics
... thermal convection in the mantle. The idea of thermal convection is that when a substance is heated from below —as the mantle would be by radioactivity at the Earth’s core—its density decreases and it rises. Once at the surface, it cools, becomes denser and sinks. Holmes proposed that the repeated h ...
... thermal convection in the mantle. The idea of thermal convection is that when a substance is heated from below —as the mantle would be by radioactivity at the Earth’s core—its density decreases and it rises. Once at the surface, it cools, becomes denser and sinks. Holmes proposed that the repeated h ...
Document
... Trenches are long, narrow, deep-cutting canyons (8 to 10 km deep) formed by slab pull (negative buoyancy) as the old, cold lithosphere descends into the hotter, less dense asthenosphere. The older, colder, denser the oceanic crust, the deeper the trench! (Basically, the mantle is pulling downwar ...
... Trenches are long, narrow, deep-cutting canyons (8 to 10 km deep) formed by slab pull (negative buoyancy) as the old, cold lithosphere descends into the hotter, less dense asthenosphere. The older, colder, denser the oceanic crust, the deeper the trench! (Basically, the mantle is pulling downwar ...
Volcanoes and Igneous Activity Earth
... the crest of ridges represent divergent plate boundaries. • Rift valleys are deep faulted structures found along the axes of divergent plate boundaries. They can develop on the seafloor or on land. • Seafloor spreading produces new oceanic lithosphere. ...
... the crest of ridges represent divergent plate boundaries. • Rift valleys are deep faulted structures found along the axes of divergent plate boundaries. They can develop on the seafloor or on land. • Seafloor spreading produces new oceanic lithosphere. ...
Document
... Laurasia was still moving, and as it moved it broke up into the continents of North America, Europe and Asia. Gondwanaland also continued to spread apart and it broke up into the continents of ...
... Laurasia was still moving, and as it moved it broke up into the continents of North America, Europe and Asia. Gondwanaland also continued to spread apart and it broke up into the continents of ...
The Theory of Tectonic Plates
... C. Convection: hot magma deep from within the Earth rises, cools, then sinks. – The number 1 reason for plate movement. – This movement of magma causes plates to move. ...
... C. Convection: hot magma deep from within the Earth rises, cools, then sinks. – The number 1 reason for plate movement. – This movement of magma causes plates to move. ...
Objective: Describe the composition and structure of Earth.
... Terms of Use: Tectonic Plates, Divergent Boundaries, Convergent Boundaries, Seafloor Spreading, Subduction, Convection ...
... Terms of Use: Tectonic Plates, Divergent Boundaries, Convergent Boundaries, Seafloor Spreading, Subduction, Convection ...
1 Section 4.4 - Sea- Floor Spreading Directions
... 8) How is a mid-ocean ridge like the seam of a baseball? It curves along the sea floor extending into all of the Earth’s oceans 9) Where does most of the mid-ocean ridge lie? Underneath hundreds of meters of water 10) Identify an example of a place where a mid-ocean ridge lies above the ocean’s ...
... 8) How is a mid-ocean ridge like the seam of a baseball? It curves along the sea floor extending into all of the Earth’s oceans 9) Where does most of the mid-ocean ridge lie? Underneath hundreds of meters of water 10) Identify an example of a place where a mid-ocean ridge lies above the ocean’s ...
First Quarter Exam Review Sheet Name
... Along which type of plate boundary do mid-ocean ridges occur? Draw diagrams that show how plates interact at each of the following: A. The Himalaya (continental-continental convergent boundary) B. San Andreas (transform boundary) C. The Cascades (continental-oceanic convergent boundary) D. The Mid-A ...
... Along which type of plate boundary do mid-ocean ridges occur? Draw diagrams that show how plates interact at each of the following: A. The Himalaya (continental-continental convergent boundary) B. San Andreas (transform boundary) C. The Cascades (continental-oceanic convergent boundary) D. The Mid-A ...
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.