evidence that our plates move - HULK SCIENCE
... Chain of volcanic islands that form at the boundary. As one plate sinks it melts and the magma rises forming volcanic islands. Examples: Philippines & Aleutian Oceanic-Continental Subduction Denser ocean crust sinks under the continental crust. The Pacific Plate is sinking under the North ...
... Chain of volcanic islands that form at the boundary. As one plate sinks it melts and the magma rises forming volcanic islands. Examples: Philippines & Aleutian Oceanic-Continental Subduction Denser ocean crust sinks under the continental crust. The Pacific Plate is sinking under the North ...
Plate Tectonics
... The lithosphere is broken into plates that move on the asthenosphere. There are divergent, transform and convergent boundaries between those plates. Plate movements are thought to be caused by mantle convection, ridge push and/or slab pull. The position and shape of Earth’s continents has changed ov ...
... The lithosphere is broken into plates that move on the asthenosphere. There are divergent, transform and convergent boundaries between those plates. Plate movements are thought to be caused by mantle convection, ridge push and/or slab pull. The position and shape of Earth’s continents has changed ov ...
Layers.of.Earth.part.2
... Lithospheric plates are large segments of the lithosphere that consist of oceanic and/or continental crust Seven major and many minor plates (has changed throughout Earth’s history) ...
... Lithospheric plates are large segments of the lithosphere that consist of oceanic and/or continental crust Seven major and many minor plates (has changed throughout Earth’s history) ...
Directed Reading
... a. the solid outer layer of Earth, that consists of the crust and the rigid upper part of the mantle ...
... a. the solid outer layer of Earth, that consists of the crust and the rigid upper part of the mantle ...
Review for Earth`s Structure Unit Final Use the maps to describe the
... What do the shapes of continents tell scientists about plate movement? In your response, be sure to describe several types of evidence Alfred Wegener used to support the movement of continents describe seafloor evidence that modern scientists used to support the theory of plate tectonics In basi ...
... What do the shapes of continents tell scientists about plate movement? In your response, be sure to describe several types of evidence Alfred Wegener used to support the movement of continents describe seafloor evidence that modern scientists used to support the theory of plate tectonics In basi ...
1 - kleung
... Fill in the blank: In the space provided, write the word or phrase that corrects answers the question. 2 points each. 14. Movement of the earth’s crust away from an oceanic ridge is called ____________________________. 15. A thrust fault is a type of ____________________________ fault. 16. Along a ...
... Fill in the blank: In the space provided, write the word or phrase that corrects answers the question. 2 points each. 14. Movement of the earth’s crust away from an oceanic ridge is called ____________________________. 15. A thrust fault is a type of ____________________________ fault. 16. Along a ...
Theory of plate tectonics
... Hess developed the idea of seafloor spreading to explain the seafloor’s formation • Continental movement is the result of ocean floor movement ...
... Hess developed the idea of seafloor spreading to explain the seafloor’s formation • Continental movement is the result of ocean floor movement ...
Theory of plate tectonics
... Hess developed the idea of seafloor spreading to explain the seafloor’s formation • Continental movement is the result of ocean floor movement ...
... Hess developed the idea of seafloor spreading to explain the seafloor’s formation • Continental movement is the result of ocean floor movement ...
Ch 9 Plate tectonics and igneous activity ppt
... ocean basins (basaltic lavas) • Third group includes those found in the interiors of continents or plates (hot spots) ...
... ocean basins (basaltic lavas) • Third group includes those found in the interiors of continents or plates (hot spots) ...
MS Word document, click here
... volcanos called seamounts that have been eroded away over time to below sea level. Off the southeastern shore of Hawai'i is the seamount called Loihi, the next Hawai'ian island. ...
... volcanos called seamounts that have been eroded away over time to below sea level. Off the southeastern shore of Hawai'i is the seamount called Loihi, the next Hawai'ian island. ...
Internal Forces That Shape the Earth
... 13. Complete the following chart on plate movements: Type Divergent ...
... 13. Complete the following chart on plate movements: Type Divergent ...
Name _________________________________ ... 13. How do seismologists locate the epicenters...
... Scientists have discovered that earthquake waves penetrate Earth. The study of these waves provides scientists with valuable information about the structure of the interior of our planet. ...
... Scientists have discovered that earthquake waves penetrate Earth. The study of these waves provides scientists with valuable information about the structure of the interior of our planet. ...
TYPES OF PLATE BOUNDARIES
... creates a crack in Earth’s crust. Lava flows through to fill the crack, creating new crust. Volcanoes and earthquakes occur here. ...
... creates a crack in Earth’s crust. Lava flows through to fill the crack, creating new crust. Volcanoes and earthquakes occur here. ...
Continental Drift
... • In 1912 a German meteorologist named Alfred Wegener noticed that the continents fit together like puzzle pieces. • He proposed that the continents were joined together in the past, in a large land mass called Pangaea. ...
... • In 1912 a German meteorologist named Alfred Wegener noticed that the continents fit together like puzzle pieces. • He proposed that the continents were joined together in the past, in a large land mass called Pangaea. ...
Convection currents
... The Mantle is the largest layer of the Earth. The middle mantle is composed of very hot dense rock that flows like asphalt. The movement of the middle mantle (asthenosphere) is the reason that the crustal plates of the Earth move. ...
... The Mantle is the largest layer of the Earth. The middle mantle is composed of very hot dense rock that flows like asphalt. The movement of the middle mantle (asthenosphere) is the reason that the crustal plates of the Earth move. ...
C4L2 Enrich Magnetic Reversals
... If the statement is true, write true. If the statement is false, change the underlined word or words to make the statement true. 1. _____________ Earth’s plates meet at boundaries. 2. _____________ Breaks in the crust called faults form where plates meet. 3. _____________ Plates slide past each othe ...
... If the statement is true, write true. If the statement is false, change the underlined word or words to make the statement true. 1. _____________ Earth’s plates meet at boundaries. 2. _____________ Breaks in the crust called faults form where plates meet. 3. _____________ Plates slide past each othe ...
Earth`s 4 main Layers
... The Earth's Crust is like the skin of an apple. It is very thin in comparison to the other three layers. The crust is only about 3-5 miles (8 kilometers) thick under the oceans (oceanic crust) and about 25 miles (32 kilometers) thick under the continents (continental crust). ...
... The Earth's Crust is like the skin of an apple. It is very thin in comparison to the other three layers. The crust is only about 3-5 miles (8 kilometers) thick under the oceans (oceanic crust) and about 25 miles (32 kilometers) thick under the continents (continental crust). ...
Plate Tectonics Misconceptions
... for instance, students may mistakenly assume that each continent is a tectonic plate, and that the boundaries for the plate are always the edges of the continent. Many students mistakenly assume that the mantle is liquid, and that it is always the direct source for volcanism, rather than a magma cha ...
... for instance, students may mistakenly assume that each continent is a tectonic plate, and that the boundaries for the plate are always the edges of the continent. Many students mistakenly assume that the mantle is liquid, and that it is always the direct source for volcanism, rather than a magma cha ...
Plate Tectonics Continued
... Pangaea. As we travel through history, the continents move apart and new oceanic crust is formed between the continents. The earth’s magnetic polarity is reversing throughout history as well. Magnetite in the rock will orient with the earth’s polarity until the rock hardens. Show magnetite’s orienta ...
... Pangaea. As we travel through history, the continents move apart and new oceanic crust is formed between the continents. The earth’s magnetic polarity is reversing throughout history as well. Magnetite in the rock will orient with the earth’s polarity until the rock hardens. Show magnetite’s orienta ...
Plate Tectonics Review With 4 Hot Spots
... • 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. ...
... • 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. ...
Overview of the Big Questions in Physical Geology
... The plates slide across the “hot silly putty” layer of the asthenosphere. Each continent is associated with a major tectonic plate, plus the Pacific plate, which is the only plate that does not have a significant chunk of continental crust. So, the major plates are: North American, South American, A ...
... The plates slide across the “hot silly putty” layer of the asthenosphere. Each continent is associated with a major tectonic plate, plus the Pacific plate, which is the only plate that does not have a significant chunk of continental crust. So, the major plates are: North American, South American, A ...
Key topics today: How do we know about the Earth`s interior structure?
... • Deep earthquakes occur along the sinking slab of ocean crust • Trench forms along subduction zone, offshore • Explosive volcanoes form along continent’s edge ...
... • Deep earthquakes occur along the sinking slab of ocean crust • Trench forms along subduction zone, offshore • Explosive volcanoes form along continent’s edge ...
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.