Continental Drift
State that the continents were once together and had broken apart and moved to the present position
What is the Theory of continental drift?
Narrow valley running through the enter of the Mid-Ocean Ridge.
What is rift valley
Rigid blocks of Earth's outer crust
What is plates
Moving away
Mountains are made here
Single land mass, means "all land"
What is pangea
Earth's crust where molten rock spreads out and adds new material to the ocean floor
States that Earth's lithosphere is broken into moving parts
What is theory of plate tectonics
Moving together
What is convergent
Trenches are made here
Northern land mass
What is Laurasia
Continuous chain of underwater mountains around the Earth
What is the Mid-Ocean Ridge
Plates float on a zone in the upper mantle known as this
What is the asthenosphere
Areas where plates meet
What is plate boundaries
Southern land mass
What is Gondwanaland
Magnetism in rocks, presence of a rift and pillow lava, no thick sediments, older rocks found away from the center of the ridge
What are four pieces of evidence that support the theory of sea-floor spreading
This state is one of the most famous hot spots in the world
Plate boundaries where most of the worlds earthquakes take place
What are transform boundaries
Least dense plates
What is Continental crust
Jigsaw fit of coastlines, matching rock types, and mountain ranges of South America and Africa
What is evidence of continental drift
Draw a diagram of seafloor spreading showing evidence within
Will judge the drawing but must include older and newer rocks, magnetism, and plate movement
Convection currents and hot plumes
What are the two explanations for the movement of plates
Where one plate is pushed under another plate
The most famous term to explain where most of the world's volcanoes are
What is the Ring of Fire