7Ocean crust is made of _______, while the Continental crust is made of _______. Which is more dense?
8Basalt & Granite. Basalt / Ocean crust is more dense. Back to Menu
9Describe the Mantle. Talk about its thickness and state of matter.
10The Mantle is the layer of molten material beneath the crust The Mantle is the layer of molten material beneath the crust. It has a plastic-like state of matter and is the thickest of Earth’s layers.Back to Menu
11What causes Earth’s magnetic field, and why is this field important?
12The spinning and churning of Earth’s liquid iron outer core The spinning and churning of Earth’s liquid iron outer core. The magnetic field protects us from the Sun’s solar winds.Back to MenuFinal Jeopardy
22Pot is heated by stove - Conduction Water is heated by pot - ConductionHeated water spreads out (energy), +Volume & -Density so it rises.Spreads out at top of pot, bumps into other particles, -Energy.Less energy means -Volume, +Density, water sinks.Back to MenuFinal Jeopardy
23Which scientist proposed the theory of Continental Drift? Harry HessJ. Tuzo WilsonAlfred WegenerMr. Antonello
24Harry Hess – Sea-Floor Spreading J. Tuzo Wilson – Plate Tectonics Alfred Wegener – Continental DriftMr. Antonello – Theory of AwesomenessBack to Menu
25How many pieces of evidence for Continental Drift does the photo below contain? What are they?
26Three pieces of evidence. A) The continents fit like puzzle pieces Three pieces of evidence. A) The continents fit like puzzle pieces. B) Mesosaurus fossils were found on both continents. C) Africa & S. America have the same folded mountains.Back to Menu
27What is Wegener’s Theory of Continental Drift and why was it rejected?
28The continents were once a supercontinent called Pangea, and are slowly moving, even now. Wegener had no evidence to explain what caused the continents to move.Back to Menu
29While researching in Antarctica, you discover the fossil remains of the tropical plant of Glossopteris. This plant is native to Australia. What does this tell you about Antarctica?
30Antarctica once had a tropical climate. Antarctica and Australia were at one time connected (since the plant can not migrate).Antarctica once had a tropical climate.Back to Menu
31What do the reversing magnetic stripes on the ocean floor reveal What do the reversing magnetic stripes on the ocean floor reveal? Use this information to explain the difference between “magnetic” North and “geographic” North.
32Stripes tell us that magnetic poles reverse every 300,000 years Stripes tell us that magnetic poles reverse every 300,000 years. Geographic North is always at 90⁰ North. Magnetic North is where the magnetic field originates.Back to MenuFinal Jeopardy
33Why is the theory of Sea-Floor Spreading important?
34Harry HessIt provides the final piece of evidence – the mechanism – for Continental Drift.Back to Menu
35Describe the Mid-Ocean Ridge and why it’s important.
36Underwater mountain range where magma cools to form new crust Underwater mountain range where magma cools to form new crust. Stretches across all the oceans of the world.Back to Menu
37Where is old crust destroyed and what is it called when the crust sinks back underneath, into the mantle?
38The crust is destroyed at deep-sea Trenches in a process known as Subduction. Back to Menu
39Studying the crust at the Mid-Ocean ridge reveals 3 pieces of evidence for Sea-floor Spreading. What are they?
40Formation of “pillow” basalts Reversing magnetic stripes Relative age dating of core samplesBack to Menu
41Describe the process of Sea-floor Spreading and why it is like a conveyor belt.
42Magma rises at the Mid-Ocean Ridge Entering the ocean, magma cools into BasaltNew magma rises and cools, spreading the rock outOld crust subducts under less dense crust and meltsThe cycle repeats!Back to MenuFinal Jeopardy
43Plate Tectonics combines the theories of Alfred Wegener & Harry Hess with a method of heat transfer. Name the theories and method.
44Continental Drift & Sea-Floor Spreading and the heat transfer method of Convection. Back to Menu
45Plate Tectonics states that plates in Earth’s lithosphere move by floating on the mantle. What are the 2 types of plates?
46Plates can be classified as either Continental or Oceanic crust. Back to Menu
47List the 3 types of boundaries symbolized by the following motions.
48Convergent, Divergent, and Transform boundaries. Back to Menu
49Locate & name the types of plate boundaries in the picture below Locate & name the types of plate boundaries in the picture below. What is the missing boundary?
50Convergent: Oceanic/Oceanic crust Subduction zone Divergent: Mid-Ocean RidgeTransform Boundary (not shown)21Back to Menu
51The Purple line on the map represents the Mid-Ocean Ridge The Purple line on the map represents the Mid-Ocean Ridge. What type of features do you think exist along the Ring of Fire and what causes them?
52The Ring of Fire marks the location of volcanic island arcs as a result of Subduction at deep-sea trenches.Back to MenuFinal Jeopardy
53You have 30 seconds to name as many plates as you can. Spelling counts! 103020