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Harrison Science

Harrison's study guide on Plate Techtonics

QuestionAnswer
What layer contains most of the Earth's Mass? Mantle
What layer is the outermost rigid layer? Lithosphere
What is the Asthenosphere? Soft Layer of Mantle
What is the strong lower part of the mantle called? Mesosphere
What is the liquid layer beneath the mantle? Outer Core
The solid, dense center is called Inner Core
What is convergent boundary? When two plates collide
What is divergent boundary? When two plates separate.
What is the Transform boundary? When two plates slide past each other horizontally.
What are produced by Earthquakes? Seismic Waves.
What are the five main physical layers of the Earth? Lithosphere, Asthenosphere, Mesosphere, outer core, inner core.
What layer are tectonics plates located in? Lithosphere
What are pieces of the lithosphere that move around on top of the Asthenosphere? Tectonic plates
Who wrote a theory of Continental Drift? Alfred Wegener
What does the theory of Continental Drift say? That the Continents can drift apart and have done so in the past.
What is the theory that Wegener had that says that all the continents were joined together in a single land mass? Pangaea
What does Pangaea mean in Greek? All Earth.
What is the process by which new oceanic lithosphere is created as older materials are pulled away. Sea floor spreading.
What is magnetic reversals? When Earth's magnetic poles change place.
How do scientists measure the rate of tectonic plate movement? By the use of a network of satellites called a global positioning system (G.P.S.).
What do scientists use G.P.S. systems to measure? The rate of tectonic plate movement on Earth.
What is the amount of force per unit area that is put on a given material? Stress.
What is the type of stress that occurs when an object is squeezed, as when two tectonic plates collide called? Compression.
What occurs when force act to stretch an object? Tension.
What occurs when rocks are pulled apart due to tension? Normal faults occur.
What occurs when rocks are pushed together by compression? Reverse fault often result.
Tectonic plates consist of both of these. Oceanic and continental crust.
Where plates meet is called what? Plate boundary.
Created by: aspires
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