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Layers of the Earth Continental Drift Sea-Floor Spreading Plate Tectonics Faults & Folds Misc. $200 $200 $200 $200 $200 $200 $400 $400 $400 $400 $400 $400 $600 $600 $600 $600 $600 $600 $800 $800 $800 $800 $800 $800 $1000 $1000 $1000 $1000 $1000 $1000 $200 Crust & Upper Mantle The lithosphere is made up of what two parts of the Earth? $400 Iron The core is made up of mainly this element. $600 Asthenosphere What does the lithosphere float on top of? $800 It contains more iron and magnesium Why is the mantle more dense than the crust? $1000 Lithosphere, Asthenosphere, Mesosphere, Outer Core, Inner Core Name the 5 layers of Earth from the surface to the center (based on physical structure) $200 Alfred Wegener What scientist first came up with the idea of Continental Drift? $400 Pangaea 250 MYA there was a supercontinent on the Earth called what? $600 Because there was no mechanism for movement Why was the theory rejected at first? $800 Puzzle pieces, similar rocks on coast, similar fossils on coasts, changing climate What 4 pieces of evidence did Wegener have to support his theory? $1000 Laurasia & Gondwana When Pangaea broke up it formed what two continents? $200 Mid-ocean ridges Where does sea-floor spreading take place? $400 Magnetic minerals on the ocean floor What is the evidence for sea-floor spreading? $600 When the magnetic poles change places What is a magnetic reversal? $800 Centimeters What units would you use to measure the rate of seafloor spreading? $1000 Molten rock contains metal minerals that will align with the Earth’s magnetic field, then cool and stay as a record of that time How is a record of magnetic reversals recorded at mid-ocean ridges? $200 Oceanic & Continental What are the two types of tectonic plates? $400 Convergent, Divergent, Transform What are the three types of plate boundaries? $600 Because the atoms move farther away, making it less dense that the surrounding rock Why does hot rock rise? $800 Because oceanic lithosphere is more dense than continental lithoshpere Why does an oceanic plate subduct below a continental plate? $1000 Ridge push & Slab pull Other than convection, what are two possible causes of tectonic plate motion? $200 Normal, Reverse (Thrust), & Strike-Slip What are the 3 types of faults? $400 Reverse or Thrust Fault In what type of fault does the hanging wall move up relative to the footwall? $600 Normal Fault What type of fault occurs because of tension? $800 Left=footwall, Right=hanging wall Look at the fault above, which block is the footwall? Which is the hanging wall? $1000 Anticline What type of fold is shown below? QuickTime™ and a decompressor are needed to see this picture. $200 Black What color shirt did Mrs. Harper wear yesterday? $400 earthquakes What unit are we going to start on Thursday? $600 Masquerade What was the theme of the Junior High dance last Friday? $800 Black lab mutt What kind of dog do I have? $1000 Columbus Crew Who is Mrs. Harper’s favorite soccer team? Daily Double Laurasia & Gondwana When Pangaea broke up it formed what two continents? The Jeopardy champion!