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Plate Tectonics What evidence do scientists have to support the fact that the Earths crust is continuously moving?
Plate Tectonics The theory that describes how tectonic plates move and shape Earths surface Tectonic plates are huge pieces of crust that fit together at their edges to cover Earths surface.
About 12 plates exist on Earth
Earths Interior Crust – Rigid outer shell of Earth –Oceanic and Continental Crust Mantle –Upper mantle is partially molten –Lower mantle is rigid (solid)
Earths Interior Core –Outer core is molten iron, source of Earths magnetic field –Inner core is solid, Iron and Nickel
Plate Boundaries Divergent Boundary Convergent Boundary Transform Boundary
Divergent Boundary Two tectonic plates move apart from each other Rift valleys – long narrow depressions Rift valley in East Africa
Convergent Boundary Two tectonic plates move towards each other (come together) Oceanic Plates are more dense Continental Plates are less dense
Subduction Process when one tectonic plate slips beneath another plate
Oceanic – Oceanic –Subduction Occurs –Deep Sea Trenches (Marianas Trench)
Oceanic – Continental –Subduction Occurs –Trench and Volcanic Arch (Peru – Chile Trench)
Continental – Continental –Mountain Building –Himalayas –Aleutian Islands
Transform Boundary Region where two plates slide past each other Earthquakes occur at transform boundaries San Andreas Fault in San Francisco
What is it? And what makes it work?. Our Earth Not a solid ball of rock Composed of distinct layers Three main layers based on composition:
Essential Questions How does the movement of Earth’s tectonic plates result in many geologic features? What are the three types of plate boundaries and.
Seafloor Spreading Theory Explains how ocean crust is formed at ocean ridges and destroyed at deep- sea trenches Supports Wagener’s continental drift.
Plate Tectonics – Section Describe how Earth’s tectonic plates result in many geologic features. Compare and contrast the three types of plate.
Inner core – hot, solid iron and nickel Outer core – hot, molten iron and nickel Mantle – hot rock Crust – solid outer layer of the Earth 1.
The Theory of Plate Tectonics 3.3 notes How plates move The theory of plate tectonics states that pieces of Earth’s lithosphere are in slow, constant.
Plate Tectonics. The crust is broken into plates that float on the mantle. The crust is broken into plates that float on the mantle. Sometimes the plates.
Guided Notes on the Theory of Plate Tectonics Chapter 17, Section 3.
Plate Boundaries JOURNAL PAGE 65. The edges of the plates meet at lines called plate boundaries. When rocks slip past each other along these boundaries.
Theory of Plate Tectonics Plate Tectonics Plate Boundaries Causes of Plate Tectonics.
Earths Structure Goal: Be able to identify the structure of the earth’s interior.
The theory of plate tectonics explains the formation, movements, and subduction of the earth’s plates. ◦ What is a plate? A section of lithosphere.
Plate Boundaries. Earth’s outer layer is divided into many strong, moving lithospheric plates lithospheric Tectonic Plates Plate Tectonics.
Plate Tectonics. The Theory of Plate Tectonics is a theory that describes the formation, movements, and interactions of Earth’s lithospheric plates that.
Plate Boundaries Earth’s crust plus the upper mantle forms the lithosphere. Earth’s lithosphere is broken in a number of different pieces. How these pieces.
17.3 Plate Boundaries Objectives Describe how Earth’s tectonic plates result in many geologic features Compare and contrast the 3 types of plate boundaries.
Plate Tectonics. Continental Drift _________ proposed the theory that the crustal plates are moving over the mantle. This was supported by fossil and.
Plate Tectonics Chapter 9. Theory of Plate Tectonics Plate Tectonics Plate Boundaries Causes of Plate Tectonics.
The Earth’s Interior & Plate Tectonics Physical Science Chapter 17 Section 1.
Intro Objective 10/5/11 Describe the three types of tectonic plate boundaries. What do you think forms when two tectonic plates collide? What about when.
Plate Tectonics. What is Plate Tectonics The Earth’s crust and upper mantle are broken into sections called plates These plates move around on top of.
Bell Work: September 3 Define The Plate Tectonic Theory What are some ways that plate tectonics change the surface of the earth?
Warm UP 12 / 03/ 12 Give the three sources of evidence to support the theory of Continental Drift.
Plate Tectonics Plate Boundaries and Interactions.
Theory of Plate Tectonics. How do we know the plates exist? Earthquake and Volcano Zones Ocean floor features (Trenches and Mid-Oceanic ridges)
Plate Tectonics Earth Science Chapter 9. Continental Drift scientific theory proposing the slow, steady movement of Earth’s continents Alfred Wegener:
PLATE BOUNDARIES. THE PLATES OF THE EARTH The Earth’s crust is made up of plates. The plates move in specific directions. The three directions that the.
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