The Mantle<br />The mantle is the layer of the Earth between the crust and the core.<br />The mantle is very thick<br />Contains most of the Earth’s mass<br />No one has really seen what the mantle looks like.<br />The Ocean floor gives us many clues about the mantle<br />Underwater Volcanoes<br />
The Core<br />The core is the layer that begins at the bottom of the mantle and ends at the center of the Earth.<br />The core is made mostly of Iron<br />There is a Inner and Outer Core<br />
Inner and Outer Core <br />The outer core is the liquid layer of the earth’s core.<br />The inner core is the solid, and dense center of the planet.<br />
The Physical Layers of the Earth<br />Lithosphere<br />Greek for “Rock Sphere”<br />Divided into pieces called tectonic plates<br />Made up of the crust and the rigid upper part of the mantle.<br />Asthenosphere<br />Greek for “Weak Sphere”<br />Lies between the Lithosphere and Mesosphere<br />Made of solid rock<br />Mesosphere<br />Greek for “Middle Sphere”<br />Lies between the Asthenosphere and the Earth’s Core<br />
Temperature and Pressure increase as you move towards the center of the Earth.<br />Plasticity is a solid that has the ability to flow.<br />Convection currents are hot material that becomes less dense and rises while cooler material becomes denser and sinks.<br />This occurs in mantle layer of the Earth.<br />
Mapping the Earth’s Interior<br />Scientist use Earthquakes to find out information about the interior of the earth<br />Seismic waves are vibrations produced by earthquakes<br />The waves traveling speed determines the Earth’s density.<br />Seismographs are used to measure the travel times of the waves<br />
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