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Theories
Boundaries 1
Boundaries 2
Tectonics
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100
All of the continents were once called this.
What is Pangea?
100
What was discovered by Hess's experiments with Sonar
What is the Mid Ocean Ridge?
100
This land-form is found at the site of ocean-continent and ocean- ocean convergent boundaries
What are volcanoes?
100
This is what causes the continents to move.
What are convection currents in the mantle?
100
the two types of rock found in continent and oceanic crust
what is basalt and granite?
200
Came up with the theory of Continental drift.
Who was Wegener ?
200
The type of boundary that causes The Mid-Atlantic Ridge
What is a divergent boundary? 
200
This land formation forms from Continent-continent boundaries
What are mountain chains?
200
The way scientists discovered that the rocks farther from the MOR were older than ones closer
What is drilling and determining the age of the rocks?
200
The Earth's core is described as this.
What is a dense ball of solid iron and nickel?
300
The author of the theory of continental drift was ridiculed for his theory because of this.
What is he could not come up with a mechanism of how the continents moved or evidence to prove his theory?
300
This process causes the old ocean floor to create new ocean floor in symmetrical layers
What is Sea Floor Spreading?
300
This type of boundary causes earthquakes.
What is a transform boundary
300
This theory states that pieces of the earth are in constant motion.
What is the theory of plate tectonics?
300
These are found in all of earth's oceans.
What are mid-ocean ridges?
400
These are the three discoveries that were used to explain continental drift by Wegener.
What are 1.how the continents fit like a jigsaw puzzle 2. fossils 3 . mountain chains and rock formations
400
It is the process by which the ocean floor sinks under a deep ocean trench
What is subduction?
400
They are the three categories of boundaries
What are 1. convergent 2. divergent 3. Transform
400
This is the number of MAJOR tectonic plates
What is 12?
400
This layer is under the lithosphere of the earth.
What is the asthenosphere?
500

He said that “The present is the key to the past” 

Who was Hutton?
500
This is created when the MOR is formed
What is a rift valley?
500
Describes the three crust boundaries at the convergent boundaries:
What are 1. Ocean - Ocean 2. Ocean - Continent 3. Continent - Continent
500
The place in the Earth where scientists believe convection currents are
What is the mantle?
500
This is why scientists believe that the earth's core is solid.
What is the fact that earthquakes are not felt on the opposite side of the earth from where it takes place on one side and our magnetic field stems from the circulation of the outer core's hot iron/nickel