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- 1. Multiple ChoiceWhat causes the crust to move?convectionconductiontensionradiation
- 2. Multiple ChoiceWhich of the following supports the theory of seafloor spreading?Correlation of rock layersCrustal AgeMagnetic ReversalContinuous Mountain Chains
- 3. Multiple ChoiceThe OLDEST seafloor is located?Closest to the mid-ocean ridgeFarthest from the mid-ocean ridge
- 4. Multiple ChoiceWhich ocean has the OLDEST seafloor?Pacific OceanAtlantic Ocean
- 5. Multiple ChoiceThe THICKEST sea floor is located?Closest to the mid-ocean ridgeFarthest from the mid-ocean ridge
- 6. Multiple ChoiceTrue or False : Sea-floor Spreading adds new material to the ocean floor?TrueFalse
- 7. Multiple ChoiceWhat evidence helps scientists show how sea floor spreading occurs?Ocean Floor MaterialMagnetic StripesDrilling SamplesAll of the Above
- 8. Multiple ChoiceWhat happens when Subduction occurs?Parts of the crust fall into the mantleParts of the crust fall into the coreParts of the crust fall into spaceNone of the Above
- 9. Multiple ChoiceWhat are Mid-Ocean Ridges?A chain of underwater waterfallsA chain of underwater volcanosA chain of underwater mountainsA chain of underwater rocks
- 10. Multiple ChoiceWhen one tectonic plate __________ under another at a convergent boundary it sinks back in the mantle.subductsfallssinks
- 11. Multiple ChoiceWhat 3 kinds of evidence were used to prove that the seafloor spread?Pillow lava, age of rocks, WWII shipwrecksAge of rocks, magnetic seafloor stripes, WWII ship logsPillow Lava, magnetic seafloor stripes, age of rocks
- 12. Multiple ChoiceMagma, or molten material, __________ and hardenscoolswarmsshrinks
- 13. Multiple ChoiceThe oceanic crust is pushed aside on both sides of theContinent's edgeDeep-ocean trenchMid-ocean ridge
- 14. Multiple ChoiceThe process that happens at the deep-ocean trench is called...sea-floor spreadingadding material to the ocean floorsubduction
- 15. Multiple ChoiceThe land feature that happens when there is subduction is called a...mid-ocean ridgedeep-ocean trenchasthenosphere
- 16. Multiple ChoiceNew crust is always formed at the...mid-ocean ridgedeep-ocean trenchasthenosphere
- 17. Multiple ChoiceOlder crust is found towards the...Mid-ocean ridgeDeep-ocean trenchAsthenosphere
- 18. Multiple ChoiceWhich is NOT evidence of sea-floor spreading?Molten magma constantly eruptingDrilling samples of rockMagnetic stripesFossil evidence
- 19. Multiple ChoiceSea-floor spreading begins at theDeep ocean trenchMid-ocean ridge
Mid-ocean ridgeContinent's edge - 20. Multiple ChoiceProcess by which new ocean lithosphere forms.Seafloor spreadingContinental driftMid-ocean ridgeRift
- 21. Multiple ChoiceUndersea mountain range.RiftMid-ocean ridgeseafloor spreadingContinental drift
- 22. Multiple ChoiceWhy were magnetic patterns found on the ocean floor puzzling?They showed alternating bands of normal and reversed polarity.No rocks were magnetic.They did not show alternating bands of normal and reversed polarity.All rocks were magnetic.
- 23. Multiple ChoiceMassive pieces of land that are part of the Earth's crust and upper mantleTectonic platesTrenchesDivergent boundaryContinental shelves
- 24. Multiple ChoiceThe zone where one plate slides under another is called theConvergent zoneSubduction zoneTransform zoneMantle zone
- 25. Multiple ChoiceThe entire cycle of heating occurring in the mantle is calledConvection currentsCompound currentsheat currentssubcurrents
- 26. Multiple ChoiceWhen looking at mid ocean ridges the oldest rocks areIn the middleFound close to the rift zoneFound far from the mid ocean ridges
- Answer choicesTagsAnswer choicesTags