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100
The theory that the continents were once joined but slowly drifted apart.
What is continental drift?
100
A theory that new sea floor is formed when magma is forced upward.
What is seafloor spreading?
100
We live on this plate.
What is the North American Plate?
100
When plates collide into each other.
What is convergent boundary?
100
The scientist that first suggest the theory of continental drift.
Who is Alfred Wegener?
200
A process that continually adds new material to the ocean floor.
What is sea-floor spreading?
200
A large landmass that existed about 200 million years ago when all the continents were joined together.
What is pangaea?
200
Magnetic stripes, drilling samples, and existence of life.
What is evidence of sea floor spreading?
200
A theory that Earth's crust and upper mantle are broken into plates that float and move around on a plasticlike layer.
What is Plate Tectonics?
200
When plates slide past each other.
What is transform boundary?
300
The mid-ocean ridge is this type of plate boundary.
What is divergent boundary?
300
This is what causes the tectonic plates to move on top of the mantle.
What is convection currents?
300
Fossils, Climate, and Rocks
What are continental drift clues?
300
Sea floor spreading occurs here.
What is What is Mid-Ocean Ridge?
300
A current in Earth's mantle that transfer heat in Earth's interior and is the driving force for plate tectonics.
What is a convection current?
400
This is the layer of Earth the ocean floor is part of.
What is the crust?
400
This plate boundary causes earthquakes.
What is transform boundary?
400
The only liquid layer of the earth.
What is the outer core?
400
an area where an oceanic plate goes down into the mantle.
What is subduction zone?
400
This is the type of tectonic plates that are moving apart from eachother.
What is divergent?
500
Rocks on the sea floor record this in magnetic stripes.
What is Earth's magnetic field reversal?
500
A large section of Earth's oceanic or continental crust that moves around on the asthenosphere.
What are plates?
500
This plate boundary creates mountain ranges and volcanoes.
What is convergent boundary?
500
The band of active volcanoes that encircle the Pacific Ocean.
What is "The Ring of Fire?"
500
A chain of underwater mountains along which sea-floor spreading occurs.
What is mid-oceanic ridge?