Earth's Lithosphere: Causes of Plate Movement PDF
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GP L. Alcantara
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This document provides an overview of the Earth's lithosphere, including the definition of lithosphere and types of crust (continental and oceanic). It also discusses plate tectonics, convection currents, and the scientific basis for dividing lithospheric plates. It appears to be a science educational resource.
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EARTH’S LITHOSPHERE GP L. ALCANTARA Objectives: 1. Describe the Earth’s lithosphere and differentiate oceanic and continental crust. 2. Infer that the Earth’s lithosphere is divided into plates. 3. Identify the major lithospheric plates. 4. Determine the scientific basis fo...
EARTH’S LITHOSPHERE GP L. ALCANTARA Objectives: 1. Describe the Earth’s lithosphere and differentiate oceanic and continental crust. 2. Infer that the Earth’s lithosphere is divided into plates. 3. Identify the major lithospheric plates. 4. Determine the scientific basis for dividing the lithospheric plates. Observe the Picture Do you still remember the different layers of the Earth? Lithosphere See the source image is the rigid, rocky outer layer of the earth consisting of the crust and the solid outermost layer of the upper mantle. Two Types of Crust Continental Crust Oceanic Crust Continental Crust See the source image is the layer of rocks that forms the continents and the areas of shallow seabed close to their shores known as continental shelves. Can you give an example of CONTINENTAL CRUST? Oceanic Crust outermost layer of lithosphere found under the oceans and formed at spreading centers on oceanic ridges. Can you give an example of OCEANIC CRUST? Rock Composition Continental Crust – made up of granitic rock which are less dense. Oceanic Crust – made up of basaltic rock which are denser. Question When an oceanic crust collides with a continental crust, which one will subduct? Earth is Divided into Plates Primary Plates Secondary Plates 1. African Plate 1. Arabian Plate 2. Antarctic Plate 2. Caribbean Plate 3. Eurasian Plate 3. Cocos Plate 4. Australian Plate 4. Juan de Fuca Plate 5. North American Plate 5. Nazca Plate 6. Pacific Plate 6. Philippine Plate 7. South American Plate 7. Scotia Plate Can you identify the plates? SCIENTIFIC BASIS FOR DIVIDING LITHOSPHERIC PLATES Convection Current Convection Current Convection Current Drives the movement of Earth’s rigid tectonic plates in the planet’s fluid molten mantle caused by the heat from the core. Convection Current Asthenosphere See the source image the upper layer of the Earth’s mantle, in which there is relatively low resistance to plastic flow and convection is thought to occur.
