1. Crust: The Earth’s surface is composed mostly of water‚ basalt and granite. Oceans cover about 70% of Earth’s surface. The Earth’s thin‚ rocky crust is composed of silicon‚ aluminum‚ calcium‚ sodium and potassium. The crust is divided into continental plates which drift slowly (only a few centimeters each year) atop the less rigid mantle. The crust is thinner under the oceans; this is where new crust is formed. Continental crust is about 25-90 km thick. 2. Mantle: Under the crust is the rocky
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crust and the uppermost portion of the mantle Varies; the crust and the mantle have different compositions About 100 km Cool‚ rigid‚ and brittle Mantle Uppermost portion of the mantle included as part of the lithosphere Asthenosphere Remainder of upper mantle Lower mantle Entire mantle is ultramafic rock. Its mineralogy varies with depth Extends from 100-350 km Extends from 350-670 km Extends from 670-2900 km Hot and plastic
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INTRODUCTION For millennia mankind has inhabited the third planet from the sun; the planet that supports life and is know to us as Earth. Although there has been life on Earth for quite sometime‚ it is only in the past few centuries that man has come to learn about what makes up the interior of this planet. The English scientist‚ Isaac Newton‚ can be seen as a pioneer in regards to learning about the Earth ’s interior‚ as he calculated from his studies of planets and the force of gravity‚ that
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<center><b>What is the evidence for our knowledge of the internal structure of the Earth?</b></center><br><br>As we enter the twenty first century we are beginning to learn more and more about the composition of the Earth. Early predictions have thrown up some rather strange and peculiar thoughts as to what is making up our Earth‚ but now day¡¦s scientists can be confident that the Earth is made up of what they think. As from experiments and other sources of information a picture to what is really
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Lesson Plan : Earth’s Mantle Convection Teacher Name: Adams Grade: Grade 7-8 Subject: Science Topic: Convection Currents in the Earth’s Mantle Content: Convection currents‚ Earth’s interior structure‚ Plate tectonics Goals: The student will set up a model of a situation occuring in nature. The student will make predictions based on prior knowledge. The student will use appropriate techniques in measuring velocity. The student will communicate‚ critique‚ and analyze their work
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LESSON PLAN IN SCIENCE 6 (Semi-detailed) I. OBJECTIVES a. Identify the layers of the Earth; b. Describe each layer and its composition; and c. Label the layers of the Earth’s surface. II. LEARNING TASKS a. Topic: The Earth’s Surface b. Concepts: a. The major sections of the earth based on chemical composition are the crust‚ mantle and the core. b. The crust is the outer layer; the mantle is the middle layer and the core the inner layer. c. Values: Gratefulness d. Skills:
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Why will the Alaskan Way Viaduct collapse? The Alaskan Way Viaduct will collapse because of an earthquake.The earthquake’s cause has to do with the layers of the Earth‚ mainly the lithosphere and the asthenosphere. The result of the lab “Density Column” proved that since the layers of the Earth are stacked on top of each other‚ like the liquids in the “Density Column”‚ the layers must have different densities. Another lab that was done in class‚ “Density Cubes”‚ showed that density‚ or
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ME AND MY EARTH 3 Moho not mojo 4 2 types of lithosphere 5 Second Figure is not useful and should be replaced or at least deleted 6 Lithosphere part of Tectonic Plate THEORY 7 Formula under oceanic lithosphere 8 Definition of lithosphere asthenosphere boundary Older comments[edit] 168.212.92.5 17:06‚ 21 September 2006 (UTC)well i just wanted to put something on this page so yeah‚ that’s it! LOL! Hi! I never done this be4 coolio!!!!!! —Preceding unsigned comment added by 24.24.255.185 (talk)
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crust‚ asthenosphere‚ and lithosphere? The core is divided into three major compositional layers. The crust on Earth’s surface‚ the rocky mantle beneath the crust and the metallic core which is the center of the Earth. While distinct and separate parts of Earth‚ they are all interconnected. The metallic inner core is solid‚ surrounded by a liquid (molten) outer core. Most of the mantle is solid‚ except for a layer very close to the crust boundary: the asthenosphere. The asthenosphere is plastic-like
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First‚ we’ll make sure we know what these terms mean. Igneous and metamorphic rocks: igneous – rocks that have formed from the cooling of magma. Metamorphic rocks are rocks that have been altered. Amphibole etc. These are types of minerals that are part of the recipe of igneous rocks. Plutonic: cooled beneath the earth surface Felsic: more feldspar mineral and more silica Mafic – more magnesium and iron rich minerals. Peridotite – the rock that forms in the mantle – lots of minerals
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