The name given to the super-continent that existed over 250 million years ago.
What is Pangaea?
100
This is the process of adding new material to the ocean floor.
What is Sea-Floor Spreading?
100
This constant motion within the asthenosphere causes the plates to move.
What are Convection Currents?
100
This is when two plates collide.
What is Convergent Boundaries?
100
The location on Earth's surface where an earthquake originates from.
What is the epicenter?
200
Earth's continents fit together like __________ and that is one piece of evidence scientists use to prove that Pangaea once existed.
What are puzzle pieces?
200
Long underwater mountain chains formed by divergent boundaries.
What are Mid-Ocean Ridges?
200
These are the breaks in Earth's crust.
What are Faults?
200
This is when two plates separate or divide.
What is Divergent Boundaries?
200
This is the first wave to be picked up by a seismograph from an Earthquake.
What is a P (primary) wave?
300
Term for an ancient organism that has been preserved in rock; They were also evidence used to prove Pangaea once existed (all continents were connected).
What are Fossils?
300
During subduction, the ocean floor sinks back into the mantle creating these underwater.
What are Deep Ocean Trenches?
300
Two continental plates colliding will create this feature.
What are Mountains?
300
This is when two plates slide past each other.
What is Transform Boundaries?
300
This is the layer of earth that is broken up into plates.
What is the Lithosphere?
400
Term for the continents slow movement on Earth's surface
What is Continental Drift?
400
As sea-floor spreading happens, the youngest ocean floor is created and is found at this location.
What is divergent plate boundary? (Mid-Ocean Ridge)
400
Transform boundaries usually cause these to happen.
What are Earthquakes?
400
When an oceanic plate and a continental plate collide at a convergent boundary, the oceanic plate is forced under the continental in this process.
What is subduction?
400
This is the location on Earth where most of the world's earthquakes happen and volcanoes are found.
What is the Ring of Fire?
500
Pangaea split apart into these two large continents.
What were Laurasia and Gondwanaland?
500
These are found on the Mid-Ocean Ridge and are used as evidence to prove that sea-floor spreading is happening.
What are volcanoes?
500
The Atlantic Ocean moves this many cm a year.
What is 2-3 cm?
500
This is the theory that proves that plates move across Earth's surface.
What is the Theory of Plate Tectonics?
500
Scientists use these to discover what the layers are inside Earth.