Plate Tectonics PP and Bellringers
... a. They occur randomly across the world b. Quakes tend to happen along plate boundaries but volcanoes are random c. Both quakes and volcanoes tend to occur at plate boundaries ...
... a. They occur randomly across the world b. Quakes tend to happen along plate boundaries but volcanoes are random c. Both quakes and volcanoes tend to occur at plate boundaries ...
Plate Tectonics - NewPath Learning
... discoveries throughout the 20th century led to a completely new theory, known as plate tectonics. This theory was first proposed in the early 1960’s. As explained above, one piece of the theory is sea-floor spreading. This explains how oceanic crust is formed. Geologists explained the presence of de ...
... discoveries throughout the 20th century led to a completely new theory, known as plate tectonics. This theory was first proposed in the early 1960’s. As explained above, one piece of the theory is sea-floor spreading. This explains how oceanic crust is formed. Geologists explained the presence of de ...
Ch 4 Plate Tectonics
... • Heat Transfer - Movement of energy from warmer object to cooler object. • Radiation- Transfer of Energy through empty space. • Conduction- Transfer of energy by direct contact. ...
... • Heat Transfer - Movement of energy from warmer object to cooler object. • Radiation- Transfer of Energy through empty space. • Conduction- Transfer of energy by direct contact. ...
Internal Structure of the Earth
... center of the Earth • Extremely deep trenches are formed, and also chains of volcanic islands are created (island arcs) • The Japanese Islands are formed this way. ...
... center of the Earth • Extremely deep trenches are formed, and also chains of volcanic islands are created (island arcs) • The Japanese Islands are formed this way. ...
to view the Slideshow
... 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 the earth where new land is being created, remember ...
... 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 the earth where new land is being created, remember ...
The Earth`s Interior
... Convergent Boundaries Ex: Andes Mountains in S. America (Still growing because of subduction) 3. ★Common place to find volcanoes Ex: Cascade Range (Mt. St. Helens & Mt. Rainier) ...
... Convergent Boundaries Ex: Andes Mountains in S. America (Still growing because of subduction) 3. ★Common place to find volcanoes Ex: Cascade Range (Mt. St. Helens & Mt. Rainier) ...
2.2 Notes
... • In 1906 the booming city of San Francisco was destroyed by an earthquake that measured 8.6 on the Richter scale. Over 400 people were killed, and 28,000 buildings were reduced to rubble. Another slightly less forceful earthquake struck the city in 1989, doing far less damage and claiming 67 lives ...
... • In 1906 the booming city of San Francisco was destroyed by an earthquake that measured 8.6 on the Richter scale. Over 400 people were killed, and 28,000 buildings were reduced to rubble. Another slightly less forceful earthquake struck the city in 1989, doing far less damage and claiming 67 lives ...
Ch 9 3 Actions at Plate Boundaries
... The system of ridges is the longest physical feature on Earth’s surface (70,000 km long) These features are 1000 to 4000 km wide, not narrow at all Rift Valley – Deep faulted structures found along the ridge system Seafloor Spreading – process by which plate tectonics produces new lithosphere Typica ...
... The system of ridges is the longest physical feature on Earth’s surface (70,000 km long) These features are 1000 to 4000 km wide, not narrow at all Rift Valley – Deep faulted structures found along the ridge system Seafloor Spreading – process by which plate tectonics produces new lithosphere Typica ...
Unit 4 Chapter 10
... Appalachian Mountains extend Northward along Eastern Coast of North America are the same age and structure of the mountains found in Greenland, Scotland and Northern ...
... Appalachian Mountains extend Northward along Eastern Coast of North America are the same age and structure of the mountains found in Greenland, Scotland and Northern ...
Plate Tectonics – study of crustal movement, and the
... and is then melted back into the mantle, to be recycled as new ocean crust later in time. Creates 3) Continental : Oceanic mountain ranges above subduction zone. Example: Cascades (Washington to California) and Andes (South America) ...
... and is then melted back into the mantle, to be recycled as new ocean crust later in time. Creates 3) Continental : Oceanic mountain ranges above subduction zone. Example: Cascades (Washington to California) and Andes (South America) ...
Objective 8 - Reading Guide pages 150
... When two plates converge, the result is called a _________________________. When two plates collide, the _____________________ of the plates determine which one comes out on top. ________________________ crust becomes __________________ and denser as it spreads away from the mid-ocean ridge. Where t ...
... When two plates converge, the result is called a _________________________. When two plates collide, the _____________________ of the plates determine which one comes out on top. ________________________ crust becomes __________________ and denser as it spreads away from the mid-ocean ridge. Where t ...
Earth Science Library wk 8.cwk
... Location and types of volcanism. Prior to plate tectonics people tended to look for local explanations for geologic features. ...
... Location and types of volcanism. Prior to plate tectonics people tended to look for local explanations for geologic features. ...
Dynamic Earth Webquest - www .alexandria .k12 .mn .us
... 8. Plate Tectonics Theory has been widely accepted since the ___________’s. It states that Earth’s outer layer or _________________ is broken up into ________________. These plates hold ______________________ and _____________________. They are constantly __________________________. 9. Continents ov ...
... 8. Plate Tectonics Theory has been widely accepted since the ___________’s. It states that Earth’s outer layer or _________________ is broken up into ________________. These plates hold ______________________ and _____________________. They are constantly __________________________. 9. Continents ov ...
8.3 PowerPoint
... the mantle in plumes or thin columns. • Hot spots stay in one place as the plate above it moves. It helps scientists track plate movement • Hawaiian Islands are formed from hot spots. – Hot spots formed volcanoes and as the volcanoes erupted, magma rose and the water cooled it and formed land. As th ...
... the mantle in plumes or thin columns. • Hot spots stay in one place as the plate above it moves. It helps scientists track plate movement • Hawaiian Islands are formed from hot spots. – Hot spots formed volcanoes and as the volcanoes erupted, magma rose and the water cooled it and formed land. As th ...
4. Seafloor Spreading Notes
... • Earth’s magnetic field has reversed many times since its creation ...
... • Earth’s magnetic field has reversed many times since its creation ...
... plates. Be sure to explain where the energy comes from to make this process happen. The inner core is so hot that it heats up the other layers. The “puttylike” layer of the asthenosphere slowly moves – as particles get heated from core they spread out & become less dense – and they rise. They then c ...
Earth-and-plate-tectonics PowerPoint
... • Oceanic lithosphere subducts underneath the continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melted (molten) crust/water mixture rises forming volcanism • E.g. The Andes ...
... • Oceanic lithosphere subducts underneath the continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melted (molten) crust/water mixture rises forming volcanism • E.g. The Andes ...
divergent boundary - Brighten AcademyMiddle School
... SEAFLOOR SPREADING • When oceanic plates separate and form midocean ridges. Rising magma cools and forms new oceanic crust. ...
... SEAFLOOR SPREADING • When oceanic plates separate and form midocean ridges. Rising magma cools and forms new oceanic crust. ...
Theory of Plate Tectonics II
... boundaries evolving over time, because the time scale is too great, but: ...
... boundaries evolving over time, because the time scale is too great, but: ...
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.