Continental drift theory
Continental drift theory was the theory that over time, these large land masses moved from one large land mass
What are continents?
This was the decade that Plate Tectonic theory was introduced
What are the 1960s?
Sea floor spreading does this conserving action to Oceanic Crust. It's why there isn't just a giant crack in Earth's surface
What is recycle?
These boundaries occur when plates separate from each other
What are divergent boundaries?
This is the orientation of Earth's magnetic field that we find today
What is Normal Polarity?
This man invented Continental drift Theory
Who was Alfred Wegener?
The theory of Plate tectonics suggests that the crust is divided into several plates that glide over this portion of the earth
What is the mantle?
Sea floor spreading happens at these underwater "landforms"
What are Mid-Ocean Ridges?
These boundaries are the cause of violent Earthquakes we feel
What are transform boundaries?
This is the term for when the Earth's magnetic field is opposite that of today's
What is reverse Polarity?
This is the name of the supercontinent that contained all land on Earth
What is Pangea?
This is what the technology SONAR stands for
What is SOund Navigation And Ranging?
This piece of evidence for Sea Floor spreading comes from the discovery that rocks near MORs are younger than rocks further away
What is age of rocks?
What are oceanic-oceanic divergent boundaries?
This island nation is an example of a continental-continental divergent boundary
What is Iceland?
Climate Evidence exists in the form of valleys caused by these ancient ice mountains
What are glaciers?
Deep Sea Drilling is the technology that helped discover this phenomena
What is Sea Floor Spreading?
This evidence happens because of Earth's flipping magnetic poles
What is Paleomagnetism?
These specific boundaries are where mountains occur because neither crust is dense enough to sink below the other
What are continental-continental convergent boundaries?
This is the landform created at a continental continental divergent boundary
What is a rift valley?
This is the animal that gave evidence for CDT from Fossils
What is Mesosaurus?
This is the amount of Large Plates that cover the Earth
What is 7?
This evidence for Sea Floor Spreading comes from the "soft" looking nature of the rocks
What are pillow basalts?
This is what happens when a dense piece of crust sinks below a less dense piece of crust
What is a subduction zone?
This long chain of volcanic activity is the result of subduction zones
What is the Ring of Fire?