He hypothesized that the continents used to be one mass called Pangaea. They broke apart about 200 million years ago and drifted to their current locations.
Who is Alfred Wegner?
100
The type of plate boundary that created the Andes Mountain Range in South America.
What is a convergent boundary?
100
The Glomar Challenger provided support for this theory by gathering information about the location of old and new rock on the ocean floor.
What is the theory of plate tectonics?
100
This scale is used to measure the intensity of an earthquake. Intensity is usually calculated by the number of deaths resulting from the earthquake.
What is the Mercalli intensity scale.
200
The portion of the Earth that is made up of the crust and the upper mantle.
What is the lithosphere?
200
A plate boundary that involves two plates sliding past each other.
What is a transform boundary?
200
These landforms are created when plate tectonics converge.
What are mountains?
200
This is where the youngest rocks on the ocean floor are located.
What is at mid-ocean ridges?
200
If the Earth did not have subduction zones, volcanoes would still be formed at this warm location.
What is a hot spot?
300
The layer of the Earth that is the most liquid.
What is the outer core?
300
The clues that Alfred Wegner found to support his theory.
What are climate clues, glacial striations, similar rock structures, fossil clues, and puzzle-like fit.
300
A type of plate boundary that will most likely form a volcano on the land.
What is a convergent oceanic/continental boundary?
300
A sensitive device used to detect magnetic fields on the seafloor.
What is a magnetometer?
300
An scale used to measure the magnitude of an earthquake. Scientist use a seismograph to measure the quake and base it on a scale of 1-10.
What is the Richter Scale?
400
The layer of the Earth that is the most dense. This is because it is under great pressure.
What is the inner core?
400
The driving force behind the theory of plate tectonics.
What are convection currents?
400
These are created when a two plates subduct.
What are volcanoes, deep sea trenches, and subduction zones?
400
The type of plate boundary that causes seafloor spreading.
What is a divergent boundary?
400
A fault line that is a perfect example of a strike-slip-fault.
What is the San Andres Fault?
500
Of the Earth's layers, this is the thinnest.
What is the crust?
500
This forms when two oceanic plates collide.
What is a subduction zone?
500
The type of boundary that creates a mid-ocean ridge.
What is a divergent boundary?
500
Rock material that is located farther away from the mid-ocean ridge.
What is older rock material?
500
Tsunamis, like the one that recently swept over American Samoa, are caused by this.