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Chapter 4 - Plate TectonicsInside the Earth Restless Continents The Theory of Plate Tectonics Deforming the Earth’s Crust
Inside the Earth
Earth’s Layers Inner Core Outer Core Mantle Crust
The Earth’s Crust Outermost layer of the Earth 5 – 100km thickLess than 1% of the mass of the Earth, yet humans have not ever drilled all the way through it. Two types: Continental Crust Oceanic Crust
Mantle Continental Crust - Thicker and less denseOceanic Crust - Thinner and more dense
The Earth’s Mantle Between the crust and the core 2900 km thick67% of the Earth’s mass Three parts Lithosphere (half in the crust) Asthenosphere Mesosphere
Layers of the Mantle
Layers of the Mantle -- Lithosphere is the rigid layer of the Earth that includes the crust and the upper part of the mantle.
Layers of the Mantle -- Asthenosphere is the soft plastic-like layer of the mantle on which the pieces of the lithosphere float.
Layers of the Mantle -- Mesosphere is the strong lower part of the mantle.
The Core Innermost layer of the Earth 3430 km radius33% of Earth’s mass Made mostly of iron Two layers Outer core Inner core
Layers of the Core -- Outer Core is liquid
Layers of the Core -- Inner Core is solid
Tectonic Plates Pieces of the lithosphere that move around on top of the asthenosphere These plates are made up of both continental crust and oceanic crust.
Mapping the Earth’s InteriorScientists have figured out what the Earth’s interior looks like by studying how earthquake (seismic) waves travel through the Earth.
Seismic waves travel at different speeds when they travel through materials with different densities.
Scientists measure how long it takes the waves to travel through the Earth to different locations, then make calculations to figure out what the inside of the Earth is composed of.
Seismologists can then use thedistances and travel times to calculate the density and thickness of each layer of the Earth.
USGS Earthquake Hazards Program: Animation of Seismic Waves: CENTRAL ALASKA
Seismograph Scientists us a device called a seismograph to measure arrival time and magnitude of seismic waves around the Earth.
What are the three Chemical layers of the Earth?
Structure of the Earth.
Inside the Earth.
Layers of the Earth Geosphere.
Preview Section 1 Inside the Earth Section 2 Restless Continents
Chapter 4 - Plate Tectonics
Inside the Earth If you journeyed to the center of the Earth, what would you think you would see along the way? ?
1._____heat from inside the Earth 2._____type of resource minerals and metals are 3. _____cutting down all of the trees in an area 4._____crops that replenish.
1. What is the outermost layer of the Earth called?
The Dynamic EarthSection 1 The Composition of Earth Part 2.
Earth’s Interior. The Zones of Earth’s Interior Much of our knowledge of the Earth’s interior comes from the study of earthquake (seismic) waves. Seismic.
Ciyanna and Summer. The crust is the outermost layer of the Earth, but it is also the thinnest layer of the Earth.
Compositional Layers divided into 3 layers based on elements that make up each layer
Earth’s Layers Ms. Sikes. Earth’s Layers Earth has 3 layers: – 1. Crust – 2. Mantle – 3. Core.
Inside the Earth-Pages
Section 1: Earth: A Unique Planet
Earth on the Move Earth Structure & Plate Tectonics Notes.
Inside the Earth Earth has three main layers
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