landforms associated with plate boundary activity
... • These are underwater mountain ranges which develop where divergence takes place (as two plates move apart) • Ocean ridges, occur in a linear pattern, usually through the middle of oceans (e.g. the Mid-Atlantic Ridge) • As magma rises at this point (the rising limb of a convection cell), the rising ...
... • These are underwater mountain ranges which develop where divergence takes place (as two plates move apart) • Ocean ridges, occur in a linear pattern, usually through the middle of oceans (e.g. the Mid-Atlantic Ridge) • As magma rises at this point (the rising limb of a convection cell), the rising ...
Study Guide- Earth Science
... Review interactive website: http://www.learner.org/interactives/dynamicearth/structure.html ...
... Review interactive website: http://www.learner.org/interactives/dynamicearth/structure.html ...
8.9AB Plate Tectonic Theory
... away from each other; on land creates rift valleys, on the sea floor creates new ocean crust ...
... away from each other; on land creates rift valleys, on the sea floor creates new ocean crust ...
Earth`s Structures and Earthquake Study Guide
... landmass and then spread apart over 200 million years. 8. In the process of sea-floor spreading molten material rises from the mantle and erupts along the mid-ocean ridges of the world. 9. The process by which the ocean floor sinks through a deep-ocean trench and back into the mantle is known as sub ...
... landmass and then spread apart over 200 million years. 8. In the process of sea-floor spreading molten material rises from the mantle and erupts along the mid-ocean ridges of the world. 9. The process by which the ocean floor sinks through a deep-ocean trench and back into the mantle is known as sub ...
LAYERS OF THE EARTH
... crust) to 25 miles (continental crust). The crust is more dense under the ocean and less dense under the continents. The oceanic crust is mostly composed of basalt. The continental crust is mainly made of granite. The crust temperature is up to 930 degrees Farenheit. 3. asthenosphere – the layer of ...
... crust) to 25 miles (continental crust). The crust is more dense under the ocean and less dense under the continents. The oceanic crust is mostly composed of basalt. The continental crust is mainly made of granite. The crust temperature is up to 930 degrees Farenheit. 3. asthenosphere – the layer of ...
Plate Tectonics Collage
... This is a picture of a mid-ocean-ridge. This is in Thingvellir Lake in Iceland. This is the picture of the rift or the valley running along the middle of the ridge. These are made when convection currents form magma where two tectonic plates meet. Then the magma pushes upward to create something th ...
... This is a picture of a mid-ocean-ridge. This is in Thingvellir Lake in Iceland. This is the picture of the rift or the valley running along the middle of the ridge. These are made when convection currents form magma where two tectonic plates meet. Then the magma pushes upward to create something th ...
Plate Tectonics: Earth`s Plates and Continental
... them called tectonic plates. They are moving very slowly, but constantly. (Most plates are moving about as fast as your fingernails are growing -- not very fast!) Currently Earth’s surface layers are divided into nine very large plates and several smaller ones. ...
... them called tectonic plates. They are moving very slowly, but constantly. (Most plates are moving about as fast as your fingernails are growing -- not very fast!) Currently Earth’s surface layers are divided into nine very large plates and several smaller ones. ...
Plate Tectonics Study Guide
... What happens at a convergent plate boundary? How do the plates move? What geologic landforms are present at a convergent plate boundary? (Hint: there are three types of convergent plate boundaries) ...
... What happens at a convergent plate boundary? How do the plates move? What geologic landforms are present at a convergent plate boundary? (Hint: there are three types of convergent plate boundaries) ...
plate tectonics
... – One tectonic plate is forced under another plate as the plates push together. ...
... – One tectonic plate is forced under another plate as the plates push together. ...
Making Oceans and Continents
... the crests of ocean ridges called Mid-Ocean Ridges (MOR’s). These are above hot rising mantle. As plates pulled apart, cracks allow low pressure and water to hit mantle. Causes partial melting. Magma moves into fractures and makes new oceanic lithosphere ...
... the crests of ocean ridges called Mid-Ocean Ridges (MOR’s). These are above hot rising mantle. As plates pulled apart, cracks allow low pressure and water to hit mantle. Causes partial melting. Magma moves into fractures and makes new oceanic lithosphere ...
Marine Geology
... – thin outer layer • less dense, rocks that floated to the surface when the Earth was formed • between 35km and 70km thick. – not a continuous layer of rock • Split into plates, which are free to drift slowly across the surface of the planet. ...
... – thin outer layer • less dense, rocks that floated to the surface when the Earth was formed • between 35km and 70km thick. – not a continuous layer of rock • Split into plates, which are free to drift slowly across the surface of the planet. ...
How did plate tectonics emerge on Earth?
... up the minerals in the rock decreases. This in turn makes the grains even more deformable, causing a weak zone to form. Convective motion migrates through the mantle over the course of time, creating new ...
... up the minerals in the rock decreases. This in turn makes the grains even more deformable, causing a weak zone to form. Convective motion migrates through the mantle over the course of time, creating new ...
Can you find us? Map
... Now that we know that the Earth is made up of many layers we will focus on the outermost layer of the Earth known as the crust. The crust is broken up into seven pieces, or plates. These plates are carried by the lithosphere as it sits on top of the asthenosphere. In the activity below you will use ...
... Now that we know that the Earth is made up of many layers we will focus on the outermost layer of the Earth known as the crust. The crust is broken up into seven pieces, or plates. These plates are carried by the lithosphere as it sits on top of the asthenosphere. In the activity below you will use ...
Evidence for Continental Drift
... Earth’s surface rises because it is less dense than the material that surrounds it. • The magma cools and hardens when it breaks through Earth’s surface at a spreading ridge forming new sea floor. ...
... Earth’s surface rises because it is less dense than the material that surrounds it. • The magma cools and hardens when it breaks through Earth’s surface at a spreading ridge forming new sea floor. ...
common formative assessment planning template
... 2. Most volcanoes and earthquakes are located at tectonic plate boundaries where plates come together or move apart from each other. Volcanic activity and the folding and faulting of rock layers during the shifting of the Earth’s crust affect the formation of mountains, ridges and valleys. 3. The so ...
... 2. Most volcanoes and earthquakes are located at tectonic plate boundaries where plates come together or move apart from each other. Volcanic activity and the folding and faulting of rock layers during the shifting of the Earth’s crust affect the formation of mountains, ridges and valleys. 3. The so ...
Notes – Theory of Plate Tectonics
... A _______________ plate colliding with another ______________ plate. Have Collision Zones: A place where folded and thrust faulted mountains form. May form Mountain Ranges. These are Folded Mountains. like the Himalayas or the Rockies. Fault - A __________ FAULT (Rock is forced upward as it is squee ...
... A _______________ plate colliding with another ______________ plate. Have Collision Zones: A place where folded and thrust faulted mountains form. May form Mountain Ranges. These are Folded Mountains. like the Himalayas or the Rockies. Fault - A __________ FAULT (Rock is forced upward as it is squee ...
Structure of Ocean Floor
... and made up of Granite • Ocean (floor): younger, more dense, not as thick and made up of Basalt • Thus, the “Ocean Floor” “sinks” below the continent(s) and provides the habitats of ...
... and made up of Granite • Ocean (floor): younger, more dense, not as thick and made up of Basalt • Thus, the “Ocean Floor” “sinks” below the continent(s) and provides the habitats of ...
50 PLATE TECTONICS I. Introduction A. General 1. The theory of
... Plates- Plate tectonics model suggests that the outer, rigid lithosphere of the earth consists of about twenty rigid segments known as "plates". a. ...
... Plates- Plate tectonics model suggests that the outer, rigid lithosphere of the earth consists of about twenty rigid segments known as "plates". a. ...
Plate Tectonics I
... major plates, and about 20 minor plates, that behave as relatively brittle slabs, called LITHOSPHERE. They move over slow flow in an underlying plastic layer, the AESTHENOSPHERE. ...
... major plates, and about 20 minor plates, that behave as relatively brittle slabs, called LITHOSPHERE. They move over slow flow in an underlying plastic layer, the AESTHENOSPHERE. ...
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.