Converging Earthquake
... Plate tectonics refers to the motion of the outer part of the earth called the lithosphere. The lithosphere is comprised of the earth’s crust and upper part of the mantel. It is currently thought that there are 8 major plates and many minor plates that are moving across the surface of the earth. The ...
... Plate tectonics refers to the motion of the outer part of the earth called the lithosphere. The lithosphere is comprised of the earth’s crust and upper part of the mantel. It is currently thought that there are 8 major plates and many minor plates that are moving across the surface of the earth. The ...
Land Formations - Library Video Company
... surface.To understand how these land formations were created, we must first look back more than 4.5 billion ye a rs to when the Earth was mainly molten ro ck . O ver time, the surface of the Earth began to cool and harden into the outer crust. Oceans were created as the low areas of the crust filled ...
... surface.To understand how these land formations were created, we must first look back more than 4.5 billion ye a rs to when the Earth was mainly molten ro ck . O ver time, the surface of the Earth began to cool and harden into the outer crust. Oceans were created as the low areas of the crust filled ...
Changes to Earth`s Surface
... lighter ________ plate moves up and over the oceanic plate, forming mountains Some mountains form away from edges of plates, where _______ from movement at the boundaries _______ a block of rock upward seeming to rise from flat land around them ...
... lighter ________ plate moves up and over the oceanic plate, forming mountains Some mountains form away from edges of plates, where _______ from movement at the boundaries _______ a block of rock upward seeming to rise from flat land around them ...
Discovering Plate Boundaries
... Goal: Students will be able to explain and justify conclusions based on data, maps, and diagrams about the formation and boundaries of geologic features due to tectonic plate movement. Background: The Earth’s outermost layer is fragmented into plates that are moving relative to one another as they s ...
... Goal: Students will be able to explain and justify conclusions based on data, maps, and diagrams about the formation and boundaries of geologic features due to tectonic plate movement. Background: The Earth’s outermost layer is fragmented into plates that are moving relative to one another as they s ...
mountain belt
... • When sufficiently cool and dense, these rocks may sink back into the mantle at subduction zones – Downward plunge of cold rocks gives rise to oceanic trenches ...
... • When sufficiently cool and dense, these rocks may sink back into the mantle at subduction zones – Downward plunge of cold rocks gives rise to oceanic trenches ...
Evidence for a Changing Earth.
... Have you ever rode bumper cars? The plates are moving around like this crashing into each other, moving away from each other, or sliding past each other. They all move at different speeds, anywhere from a couple of millimeters to several centimeters per year. Overall they move very slowly. The place ...
... Have you ever rode bumper cars? The plates are moving around like this crashing into each other, moving away from each other, or sliding past each other. They all move at different speeds, anywhere from a couple of millimeters to several centimeters per year. Overall they move very slowly. The place ...
Earth Layers Fact Cards
... Broken into tectonic plates that float on the asthenosphere. Consists of oceanic and continental lithosphere (oceanic is more dense). Earthquakes occur in the lithosphere when tectonic plates collide. ...
... Broken into tectonic plates that float on the asthenosphere. Consists of oceanic and continental lithosphere (oceanic is more dense). Earthquakes occur in the lithosphere when tectonic plates collide. ...
Earth Science – Quiz 2
... B) transform fault zones along divergent plate boundaries C) rift zones along mid-ocean ridges D) sites of long-lived, hot spot volcanism in the ocean basins 37. Deep ocean trenches are surficial evidence for ________. A) rifting beneath a continental plate and the beginning of continental drift B) ...
... B) transform fault zones along divergent plate boundaries C) rift zones along mid-ocean ridges D) sites of long-lived, hot spot volcanism in the ocean basins 37. Deep ocean trenches are surficial evidence for ________. A) rifting beneath a continental plate and the beginning of continental drift B) ...
BAESI: Earth and Life Through Time
... Continental and oceanic crust move together. New oceanic crust forms from rising magma at mid-continental ridges Oceanic crust moves away from ridge as it cools. Mechanism: thermal convection. Slide shows a photograph of Harry Hess. ...
... Continental and oceanic crust move together. New oceanic crust forms from rising magma at mid-continental ridges Oceanic crust moves away from ridge as it cools. Mechanism: thermal convection. Slide shows a photograph of Harry Hess. ...
CHAPTER 18 Volcanism
... India could not sink into the mantle. Instead, it pushed crust upward and downward. The Himalayas were one result. Thus, the Himalayas are actually pieces of plates broken and lifted up because of the collision. Another result of this collision was the movement of China eastward, as the movement of ...
... India could not sink into the mantle. Instead, it pushed crust upward and downward. The Himalayas were one result. Thus, the Himalayas are actually pieces of plates broken and lifted up because of the collision. Another result of this collision was the movement of China eastward, as the movement of ...
PROGRAM - Tectonic Impacts
... Hardcopy worksheet, Lithospheric plates and their motion with supporting document ...
... Hardcopy worksheet, Lithospheric plates and their motion with supporting document ...
The ups and downs of sediments
... site. The Earth, however, can recycle its waste naturally. The Earth’s scum consists of ocean sediments and the rigid layer beneath composed of oceanic crust and the uppermost oceanic mantle. The movement of the tectonic plates ensures that this scum is efficiently disposed off at subduction zones w ...
... site. The Earth, however, can recycle its waste naturally. The Earth’s scum consists of ocean sediments and the rigid layer beneath composed of oceanic crust and the uppermost oceanic mantle. The movement of the tectonic plates ensures that this scum is efficiently disposed off at subduction zones w ...
Unit C: Earth Science Chapter 1: The Changing Earth Lesson 1
... 4. Coal deposits in North America match identical deposits in Europe 5. Discovery of warm-weather organisms in cold climates 6. Glacial deposits in warm climates Plate Tectonics 1. This is the theory of how continents move 2. The earth's surface is broken into about twenty sections or plates 3. Plat ...
... 4. Coal deposits in North America match identical deposits in Europe 5. Discovery of warm-weather organisms in cold climates 6. Glacial deposits in warm climates Plate Tectonics 1. This is the theory of how continents move 2. The earth's surface is broken into about twenty sections or plates 3. Plat ...
Plate Tectonic Information Cube Project
... Types of heat transfer and really expand on the one that relates to our topic _____Panel 2: Continental Drift Theory (17 points) Alfred Wegener’s theory Hypothesis based on what evidence? Pangaea o Gondwanaland o Laurasia Was the theory accepted or denied? Explain _____Panel 3: Sea Floor S ...
... Types of heat transfer and really expand on the one that relates to our topic _____Panel 2: Continental Drift Theory (17 points) Alfred Wegener’s theory Hypothesis based on what evidence? Pangaea o Gondwanaland o Laurasia Was the theory accepted or denied? Explain _____Panel 3: Sea Floor S ...
Lecture 13
... many craters has not changed much in 3 billion years • Erosion can erase craters. Thus fewer craters indicate geological activity ...
... many craters has not changed much in 3 billion years • Erosion can erase craters. Thus fewer craters indicate geological activity ...
Know What I want to Know What I learned
... Objective: You will learn about sea floor spreading. ...
... Objective: You will learn about sea floor spreading. ...
NS3310 – Physical Science Studies
... the trees. If the monkey does not move, should the keeper aim above, at, or below the monkey? If the monkey lets go of the branch at the instant the keeper shoots the food, should the keeper aim above, at, or below the monkey to get food to the monkey in mid-air? ...
... the trees. If the monkey does not move, should the keeper aim above, at, or below the monkey? If the monkey lets go of the branch at the instant the keeper shoots the food, should the keeper aim above, at, or below the monkey to get food to the monkey in mid-air? ...
Plate tectonics - Free
... Slab-pull: Current scientific opinion is that the asthenosphere is insufficiently competent or rigid to directly cause motion by friction along the base of the lithosphere. Slab pull is therefore most widely thought to be the greatest force acting on the plates. In this current understanding, plate mot ...
... Slab-pull: Current scientific opinion is that the asthenosphere is insufficiently competent or rigid to directly cause motion by friction along the base of the lithosphere. Slab pull is therefore most widely thought to be the greatest force acting on the plates. In this current understanding, plate mot ...
Plates move apart.
... measure the speed and direction of plate movements. For example, the Yellowstone hot spot under the North American Plate has formed a chain of inactive volcanoes, as shown in the diagram on the right. Scientists estimate that the North American Plate is moving southwest at about 2.3 cm (1 in.) per y ...
... measure the speed and direction of plate movements. For example, the Yellowstone hot spot under the North American Plate has formed a chain of inactive volcanoes, as shown in the diagram on the right. Scientists estimate that the North American Plate is moving southwest at about 2.3 cm (1 in.) per y ...
File
... Hikers walk in the shadow of cliffs in Ireland. The divergent Mid-Atlantic Ridge rises above sea level, with the North American plate to the west and the Eurasian plate to the east. ...
... Hikers walk in the shadow of cliffs in Ireland. The divergent Mid-Atlantic Ridge rises above sea level, with the North American plate to the west and the Eurasian plate to the east. ...
Snack Tectonics
... are made of rock, but the rock is, in general, lightweight compared with the denser, fluid layer underneath. This allows the plates to "float" on top of the denser material. The fluid dense material is called asthenosphere and in this activity the frosting represents it. However, plates are not all ...
... are made of rock, but the rock is, in general, lightweight compared with the denser, fluid layer underneath. This allows the plates to "float" on top of the denser material. The fluid dense material is called asthenosphere and in this activity the frosting represents it. However, plates are not all ...
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.