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- 1. Multiple ChoiceWhich of the following supports the theory of seafloor spreading?Correlation of rock layersCrustal AgeMagnetic ReversalContinuous Mountain Chains
- 2. Multiple ChoiceWhat causes the crust to move?convectionconductiontensionradiation
- 3. Multiple ChoiceThe zone where one plate slides under another is called theConvergent zoneSubduction zoneTransform zoneMantle zone
- 4. Multiple ChoiceThe entire cycle of heating occurring in the mantle is calledConvection currentsCompound currentsheat currentssubcurrents
- 5. Multiple ChoiceWhen looking at mid ocean ridges the oldest rocks areIn the middleFound close to the rift zoneFound far from the mid ocean ridges
- 6. Multiple Choice
What 3 kinds of evidence were used to prove that the seafloor spread?
Rock formations, age of rocks, WWII shipwrecks
Age of rocks, magnetic seafloor stripes, WWII ship logs
Rock formations, magnetic seafloor stripes, age of rocks
- 7. Multiple ChoiceWhat technology was used during WWII to detect enemy submarines and produce the first map of the seafloor?SonarRadarGPS
- 8. Multiple ChoiceUndersea mountain range.RiftMid-ocean ridgeseafloor spreadingContinental drift
- 9. Multiple Choice
Process by which new ocean crust forms.
Seafloor spreading
Continental drift
Mid-ocean ridge
Rift
- 10. Multiple ChoiceMagnetic field that points south.Modern polarityPast polarityNormal polarityReversed polarity
- 11. 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.
- 12. Multiple ChoiceThe OLDEST seafloor is located?Closest to the mid-ocean ridgeFarthest from the mid-ocean ridge
- 13. Multiple Choice
What is label GTrenchMid ocean ridgeabyssal plainsea mount - 14. Multiple ChoiceWhat are Mid-Ocean Ridges?A chain of underwater waterfallsA chain of underwater volcanosA chain of underwater mountainsA chain of underwater rocks
- 15. Multiple ChoiceTrue or False : Sea-floor Spreading adds new material to the ocean floor?TrueFalse
- 16. Multiple ChoiceWhat evidence helps scientists show how sea floor spreading occurs?Ocean Floor MaterialMagnetic StripesDrilling SamplesAll of the Above
- 17. Multiple Choice
Sea-floor spreading begins at the
Deep ocean trench
Mid-ocean ridge
Continent's edge
- 18. Multiple ChoiceNew crust is always formed at the...mid-ocean ridgedeep-ocean trenchasthenosphere
- 19. Multiple ChoiceOlder crust is found towards the...Mid-ocean ridgeDeep-ocean trenchAsthenosphere
- 20. Multiple ChoiceWhich is NOT evidence of sea-floor spreading?Molten magma constantly eruptingDrilling samples of rockMagnetic stripesFossil evidence
- 21. Multiple Choice
What is label D
Trench
Mid ocean ridge
abyssal plain
sea mount
- 22. Multiple Choice
This scientist was the first to propose seafloor spreading
William Watts
Harry Hess
Alfred Wegener
Tenzing Norgay
- Answer choicesTagsAnswer choicesTags