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- 1. Multiple Choice
Sea-floor spreading begins at the
Deep ocean trench
Mid-ocean ridge
Continent's edge
- 2. Multiple ChoiceThe oceanic crust is pushed aside on both sides of theContinent's edgeDeep-ocean trenchMid-ocean ridge
- 3. Multiple ChoiceThe oceanic crust _________ when it reaches the continental crust.sinksrisesexpands
- 4. Multiple ChoiceThe process that happens at the deep-ocean trench is called...sea-floor spreadingadding material to the ocean floorsubduction
- 5. Multiple ChoiceThe land feature that happens when there is subduction is called a...mid-ocean ridgedeep-ocean trenchasthenosphere
- 6. Multiple ChoiceNew crust is always formed at the...mid-ocean ridgedeep-ocean trenchasthenosphere
- 7. Multiple ChoiceOlder crust is found towards the...Mid-ocean ridgeDeep-ocean trenchAsthenosphere
- 8. Multiple Choice
What words describe M? choose all
deep ocean trench
mid ocean ridge
sea floor spreading
subduction
- 9. Multiple Choice
What feature is at C?
Deep ocean trench
Mid ocean ridge
sea floor spreading
subduction
- 10. Multiple Choice
What is the process happening at R?
Deep ocean trench
mid ocean ridge
subduction
sea floor spreading
- 11. Multiple ChoiceWhat grows at the divergent boundary?San Andreas FaultMid Ocean RidgeLand ridgePacific Ocean
- 12. Multiple ChoiceWhat is a divergent boundary?two plates moving towards each othertwo plates rubbing side to sidetwo plates moving away from each otherhappens in the lithosphere
- 13. Multiple ChoiceWhat is one piece of evidence of seafloor spreading?Everything points to the northshifting of the poles, N/S, S/N, N/S, SNseafloor contains magmaLake and Sea
- 14. Multiple Choice
At the Mid-Ocean Ridge and active volcanoes you can find:
fault lines
earthquakes
older crust
newest crust
- 15. Multiple Choice
Ferromagnetic molecules make up little shavings of iron that are in rock and align themselves to magnetic north when the rock is molten and liquid. Where do we find this?
Past the subduction zones where land and ocean plates collide
On either side of mid-ocean ridges
On the land under the Antarctic cap
In the layers of rock surrounding the Grand Canyon
In the convection cells of the mantle
- 16. Multiple Choice
The diagram shows the magnetic polarity (they look like zebra stripes) of the seafloor at the Mid-Ocean Ridge. Which of the following statements is true about the magnetic polarity pattern of the ridge?
Stripes of normal polarity and reversed polarity DO NOT alternate across the ocean bottom.
Stripes form mirror images (are symmetrical) on either side of the mid-ocean ridges
Stripes form different images on either side of the mid-ocean ridges
there is not a pattern that is created
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