Earth
Plate Tectonics
Continental Drift
Plate Tectonics
100
1.crust (oceanic (more dense/thinner) and continental (thicker) 2.mantle (most of Earth’s Mass) (lithosphere, asthenosphere, mesosphere), 3.outer core 4. inner core
What is (composition) the layers of the Earth starting from the outermost layer
100
The theory that states Earth’s lithosphere is divided into tectonic plates that float or move on top of the asthenosphere- (convection currents in the asthenosphere cause this to occur) tectonic plate-pieces of the lithosphere
What is the plate tectonic theory? What are tectonic plates?
100
Pangaea- “all Lands” or “all Earth
What is the name of the supercontinent proposed by Wegener? What does the name mean?
100
--rock that is melted in subduction zones form magma, which rises to the Earth’s surface and erupts to form ____________________. _____________________ can also form under sea. These mountains form at an oceanic-continental convergent boundary.
What is What are volcanic mountains, how do they form, and where do they form?
200
Solid and nickel
What is Inner core's material
200
--the more dense oceanic crust will sink (subduct) beneath the continental crust Landforms: volcanoes, trenches Geological events: volcanic eruptions, earthquakes (Subduction Zones)
What is what occurs at continental-oceanic convergent boundary?
200
Theory that was proposed by Alfred Wegener that stated that the continents were in one large landmass called Pangaea and drifted apart overtime
What is the Continental Drift Theory and who proposed the theory?
200
--formed when rock layers (continental crust) are squeezed together (compression) and pushed upward and form mountains. --they form at a convergent boundary
What is What are folded mountains, how do they form, and where do they form?
300
They increase
What happens to the temperature, density, and pressure when you descend from the inner core
300
Along the boundaries of tectonic plates
What is Where does most tectonic activity (earthquakes, volcanic eruptions, mountains, volcanic eruptions) occur?
300
mesosaurus on different continents (too small to swim in the ocean) --tropical plant fossils found in artic regions --coastlines of the continents fit together like puzzle pieces --mountain ranges on different continents lineup --coal found in artic regions --glacial grooves found in rocks in warm climates
What is 5 key pieces of evidence that Wegener discovered to support his theory of Continental Drift.
300
Continental -Continental convergent- folded mountains Continental- Oceanic Convergent- volcanoes and trenches (Subduction Zones) Oceanic-Oceanic Convergent- Ocean trenches, Volcanic Islands (Subduction Zones)
What is What landforms could be created at convergent boundary?
400
Crust Mantle Outer Core Inner Core
What is the layers from the least dense to most dense
400
when two plates(oceanic-oceanic or continental-oceanic) collide (converge) together the most dense (oceanic plate) plate is subducted (sinks) back into the Asthenosphere and melts Under water canyon (trench) can form at subduction zones
What is Describe the process of subduction. What is a deep ocean trench?
400
Sea-floor spreading happens at the Mid-Ocean Ridge Process where new oceanic curst forms, when magma is Heated in the asthenosphere, it becomes less dense and rises Creating new oceanic crust. • Magma rises when it is heated( it becomes less dense)
What is the process of sea-floor spreading. Where does the sea floor spread?
400
A break in the Earth’s Crust Most occurs along transform boundaries Earthquakes occur along this
What is What is a fault? Along what type of plate boundary do most faults form? What type of geological events occur along faults?
500
1. Crust 2. Lithosphere (Tectonic Plates)- Crust and rigid upper mantle 3. Asthenosphere (Convection Currents-caused by heat from the core) 4. Mesosphere (Lower Mantle) 5.Outer Core (Liquid Metal- iron and nickel) 6. Inner Core (Solid Metal-iron and nickel)
What is the layers of the Earth starting from the outermost layer
500
--both plates will collide, buckle and thicken Landforms: folded mountains Geological events: earthquakes
What is what occurs at a continental-continental convergent boundary?
500
Longest chain of underwater volcanic mountains in the world - forms at divergent plate boundary movement -new oceanic crust forms at the Mid-Ocean Ridge (New sea floor)
What is the mid-ocean ridge? What type of plate boundary movement exists at the mid-ocean ridge? What type of crust forms at the mid-ocean ridge?
500
--the more dense oceanic crust will sink (subduct) beneath the other plate-deep Ocean trenches can form. What happens to the oceanic crust that gets subducted? It gets melted in the Asthenosphere- What force pulls the plate down into the asthenosphere? Gravity
What is Describe what occurs at an oceanic-oceanic convergent boundary?
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