Plate Tectonics - LunsfordEnvironmentalScience
... What links some earthquakes with isostatic equilibrium? Where do such earthquakes occur? ...
... What links some earthquakes with isostatic equilibrium? Where do such earthquakes occur? ...
Intro to Geology
... • Continental drift Continents moved across Earth’s surface. (50 yrs+ for acceptance) • Plates float on asthenosphere as they move & they interact along their boundaries. • Plate movement is driven by the unequal distribution of heat w/in Earth. 1) major landscape features (mtns, valleys) 2) distr ...
... • Continental drift Continents moved across Earth’s surface. (50 yrs+ for acceptance) • Plates float on asthenosphere as they move & they interact along their boundaries. • Plate movement is driven by the unequal distribution of heat w/in Earth. 1) major landscape features (mtns, valleys) 2) distr ...
plate tectonic ppt. (volcano notes)
... which causes it to sink into the mantle forming a subduction zone. The subducting plate is bent downward to form a very deep depression in the ocean floor called a trench. • The deepest parts of the ocean are found along trenches. The Mariana Trench in the western Pacific Ocean is 11,033 meters (36, ...
... which causes it to sink into the mantle forming a subduction zone. The subducting plate is bent downward to form a very deep depression in the ocean floor called a trench. • The deepest parts of the ocean are found along trenches. The Mariana Trench in the western Pacific Ocean is 11,033 meters (36, ...
Our Dynamic Earth
... and mantle. • It is divided into 17 plates, which drift on the upper mantle. • Plates beneath the oceans are thin but made up of heavy material, but continental plates are made of light, thicker material. • Some plates move apart (divergent), overlap (convergent) and rub against each other (transfor ...
... and mantle. • It is divided into 17 plates, which drift on the upper mantle. • Plates beneath the oceans are thin but made up of heavy material, but continental plates are made of light, thicker material. • Some plates move apart (divergent), overlap (convergent) and rub against each other (transfor ...
Continental Drift, Sea-floor spreading, & Plate Tectonics
... 1. Plates move because of convection currents. A.) Convection Current - Is the movement of a fluid caused by differences in temperature. ...
... 1. Plates move because of convection currents. A.) Convection Current - Is the movement of a fluid caused by differences in temperature. ...
The What of Plate Tectonics
... Plate Boundaries Divergent boundaries are the place where two plates move apart. Makes new lithosphere. i.e. Mid Ocean Ridge, Death Valley CA Convergent boundaries form where two plates move together. Destroys existing lithosphere i.e. Japan/Indochina Transform fault boundaries are margins ...
... Plate Boundaries Divergent boundaries are the place where two plates move apart. Makes new lithosphere. i.e. Mid Ocean Ridge, Death Valley CA Convergent boundaries form where two plates move together. Destroys existing lithosphere i.e. Japan/Indochina Transform fault boundaries are margins ...
Lithosphere and Asthenosphere
... The mantle is Earth’s thickest layer, measuring nearly 2900 kilometers (1700 mi). It is made of hot rock that is less dense than the metallic core. The very top part of the mantle is cool and rigid. Just below that, the rock is hot and soft enough to move like a thick paste. The crust is a thin laye ...
... The mantle is Earth’s thickest layer, measuring nearly 2900 kilometers (1700 mi). It is made of hot rock that is less dense than the metallic core. The very top part of the mantle is cool and rigid. Just below that, the rock is hot and soft enough to move like a thick paste. The crust is a thin laye ...
Topic 4 PPT
... Pangaea -broke into Laurasia and Gondwanaland 2-still moving today measure distances, see the trenches, areas of sea floor spreading 3-common fossils ...
... Pangaea -broke into Laurasia and Gondwanaland 2-still moving today measure distances, see the trenches, areas of sea floor spreading 3-common fossils ...
Factors that Shape the Earth
... masses and covers the ridge. As the land continues to split into two continents, new oceanic crust is formed between them at the ridge, so the farther away from the ridge, the older the material. As new crust forms, old crust is forced into trenches along the continents where it is returned to Earth ...
... masses and covers the ridge. As the land continues to split into two continents, new oceanic crust is formed between them at the ridge, so the farther away from the ridge, the older the material. As new crust forms, old crust is forced into trenches along the continents where it is returned to Earth ...
The Sea Floor
... Matter expanded into space. Earth and Solar system originated from a cloud or clouds of dust. Dust particles collided with each other – those larger particles collided with one another – then those larger particles collided with one another, and so on… ...
... Matter expanded into space. Earth and Solar system originated from a cloud or clouds of dust. Dust particles collided with each other – those larger particles collided with one another – then those larger particles collided with one another, and so on… ...
Plate Tectonics and Layers of the Earth
... energy - These convection currents provide energy that moves plates Effects of Plate Tectonics: Plates are constantly interacting with other plates… What does this do to the Earth? - Forms mountain ranges, volcanoes, faults, rift valleys ...
... energy - These convection currents provide energy that moves plates Effects of Plate Tectonics: Plates are constantly interacting with other plates… What does this do to the Earth? - Forms mountain ranges, volcanoes, faults, rift valleys ...
3202 INTRODUCTION
... • refers to the movement of the more than 20 plates (9 major) due to convergent, divergent, and transform boundaries. • The continents drift at a rate of 2 inches a year. • Started 200 million years ago • Pangea (land) & Panthalasa (sea) ...
... • refers to the movement of the more than 20 plates (9 major) due to convergent, divergent, and transform boundaries. • The continents drift at a rate of 2 inches a year. • Started 200 million years ago • Pangea (land) & Panthalasa (sea) ...
Theory of Plate Tectonics: Mechanism 1
... • Problem: Earthquakes are tensional (pulling) not compressional ...
... • Problem: Earthquakes are tensional (pulling) not compressional ...
Section 17.3 Theory of Plate Tectonics
... 2. Discuss evidence of continental drift. 3. Explain why continental drift was not accepted when it was first proposed. 4. Summarize the evidence that led to the discovery of seafloor spreading. 5. Describe the uses of magnometers and sonar. 6. Explain the significance of magnetic patterns on the se ...
... 2. Discuss evidence of continental drift. 3. Explain why continental drift was not accepted when it was first proposed. 4. Summarize the evidence that led to the discovery of seafloor spreading. 5. Describe the uses of magnometers and sonar. 6. Explain the significance of magnetic patterns on the se ...
The Lithosphere
... • ____________ – sites of • ____________- chain of high rates of volcanism, volcanoes positioned in earthquakes, and an arc shape mountain building ...
... • ____________ – sites of • ____________- chain of high rates of volcanism, volcanoes positioned in earthquakes, and an arc shape mountain building ...
Chapter 11 Notes: Plate Tectonics
... continents and the size & shape of oceans Evidence shows that Pangaea was not the first supercontinent Causes changes such as formation of volcanoes, mountain ranges, and deep-ocean trenches o Plate boundaries – where plates meet Faults – breaks in the Earth’s crust where rocks have slipped pa ...
... continents and the size & shape of oceans Evidence shows that Pangaea was not the first supercontinent Causes changes such as formation of volcanoes, mountain ranges, and deep-ocean trenches o Plate boundaries – where plates meet Faults – breaks in the Earth’s crust where rocks have slipped pa ...
Brainpop - Plate Tectonics
... Fill in the blanks to complete the sentences. Use terms from the word bank below. ...
... Fill in the blanks to complete the sentences. Use terms from the word bank below. ...
Earth`s Structure quiz 1 study guide
... a. Activity depends upon the types of crust that meet b. More dense oceanic plate slides under less dense continental plate or another oceanic plate – subduction zone, some crust is destroyed c. Two continental plates converge, both plates buckle and push up into mountain ranges; 3. Transform Bounda ...
... a. Activity depends upon the types of crust that meet b. More dense oceanic plate slides under less dense continental plate or another oceanic plate – subduction zone, some crust is destroyed c. Two continental plates converge, both plates buckle and push up into mountain ranges; 3. Transform Bounda ...
Plate Tectonics and Astrobiology
... What does plate tectonics have to do with astrobiology? Plate Tectonics refers to the very slow (few cm per year) movement of ‘plates’ of planetary crust across the surface of the Earth, as well as the effects produced at the boundaries of these adjacent plates. It is fundamentally caused by the sti ...
... What does plate tectonics have to do with astrobiology? Plate Tectonics refers to the very slow (few cm per year) movement of ‘plates’ of planetary crust across the surface of the Earth, as well as the effects produced at the boundaries of these adjacent plates. It is fundamentally caused by the sti ...
ES Unit 3 standards - Springfield Public Schools
... eruptions that occur and describe the various types of materials that are ejected from volcanoes. Describe the major intrusive igneous features and the ...
... eruptions that occur and describe the various types of materials that are ejected from volcanoes. Describe the major intrusive igneous features and the ...
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.