Set: Study Guide for Plate Tectonics

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All 25 Terms

Term Definition
Continental Drift Theory Theory that states that the continents were once together; broke appart and moved to their present day locations.
Theory of Seafloor Spreading Mid-ocean ridge is a crack in the Earth's crust through which molton rock rises to the surface, adding new material to the ocean floor.
Theory of Plate Tectonics States that Earth's lithosphere (crust) broke up into moving plates.
What is the evidence for the Continental Drift? Jigsaw fit between South America and Africa, Rock and mountain types on both coasts match, Climate clues, Similar fossils on both coasts.
Pangaea "All Land"; a large, single, land mass made up of all the continents.
How long ago did Pangaea exist? 300 Million years ago.
Relationship between Rift Valleys and the MOR. Rift valleys and Mid-Ocean Ridges are both places where new materials/ocean floor is being created.
Crust Outermost layer of the earth, low density
Ocean floor basalt; 6km thick; more dense than crust
Continents granite; 20-70km thick; less dense than the crust
Mantle layer surrounding the core
Asthenosphere upper solid portion that moves like liquid
Core innermost layer of Earth
Outer Core 2000km thick; liquid iron
Inner Core 1500km radius; solid mixture of iron, nickel and cobalt
Moho Boundary between mantle and crust
Lithosphere made up of the crust and rigid upper mantle
Asthenosphere Upper, solid portion that moves like liquid
Appalachians Stretch from eastern USA to the Gulf of Mexico; created when N. America collided with Africa.
Himalayas Along the borders of Tibet and India; formed when India collided with Asia.
7 Major Plates Indian-Australian, Philippine, Juan de Fuca, Cocos, Pacific, Nazca, Antarctic, South American, Caribbean, North American, Eurasian, Arabian, African
Transform Fault Two divergent plate boundaries are sliding past eachother
Divergent Boundaries Sites where two plates are moving apart
Convergent Boundaries Place where plates (continental, oceanic) are moving together forming trenches, island arcs, and folded mountains
Subduction A place where 2 plates collide and 1 plate is pushed below the other one. Happens in a subduction zone.

Set Information

Terms 25
Creator swimalot
Created February 22, 2008
Groups None
Tags tectonics, plate
Access Anyone
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Learn voacb for Mrs. George's seventh grade science class!!

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swimalot : This set is very hellpful in learning plate tectonics.
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Most Missed Words

  1. What is the evidence for the Continental Drift? → Jigsaw fit between South America and Africa, Rock and mountain types on both coasts match, Climate clues, Similar fossils on both coasts. - 6 misses
  2. Asthenosphere → upper solid portion that moves like liquid - 5 misses
  3. Relationship between Rift Valleys and the MOR. → Rift valleys and Mid-Ocean Ridges are both places where new materials/ocean floor is being created. - 4 misses
  4. Ocean floor → basalt; 6km thick; more dense than crust - 3 misses
  5. Theory of Seafloor Spreading → Mid-ocean ridge is a crack in the Earth's crust through which molton rock rises to the surface, adding new material to the ocean floor. - 2 misses
  6. Continents → granite; 20-70km thick; less dense than the crust - 2 misses
  7. Appalachians → Stretch from eastern USA to the Gulf of Mexico; created when N. America collided with Africa. - 2 misses