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12 Cards in this Set
- Front
- Back
- 3rd side (hint)
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The youngest rocks on the ocean floor are located __________.
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a. near continents
b. at mid-ocean ridges c. far from mid-ocean ridges d. near Asia |
b. at mid-ocean ridges
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The crust and upper mantle make up Earth's __________.
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a. lithosphere
b. asthenosphere c. core d. continents |
a. lithosphere
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Scientists have observed that the plates move at rates ranging from 1 cm to 12 cm per __________.
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a. century
b. decade c. day d. year |
d. year
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Plates of the lithosphere float on the __________.
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a. crust
b. asthenosphere c. core d.atmosphere |
b. asthenosphere
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The result of plate movement can be seen at __________.
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a. abyssal plains
b. ocean margins c. plate centers d. plate boundaries |
d. plate boundaries
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The __________ are mountains formed by the collision of the Indo-Australian Plate and the Eurasian Plate.
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a. Alps
b. Rockies c. Himalaya d. Appalachians |
c. Himalaya
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The presence of the same __________ on several continents supports the hypothesis of continental drift.
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a. fossils
b. rocks c. neither a nor b d. both a and b |
d. both a and b
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The hypothesis that continents have slowly moved to their current locations is called __________.
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a. continental drift
b. continental slope c. magnetic pole d. convection |
a. continental drift
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Plates move apart at __________ boundaries.
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a. convergent
b. stable c. divergent d. transform |
c. divergent
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The alignment of iron minerals in rocks when they are formed reflects the fact that Earth's __________ has reversed itself several times in the past.
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a. magnetic field
b. core c. asthenosphere d. gravity |
a. magnetic field
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A lack of explanation for continental drift prevented many scientists from accepting that a single supercontinent called __________ once existed.
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a. Glomar
b. Glossopteris c. Pangaea d. Wegener |
c. Pangaea
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The Glomar Challenger provided support for the theory of plate tectonics by providing __________.
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a. high-altitude photos of existing continents
b. samples of plant life from mid-ocean ridges c. samples of older rock found far from mid-ocean ridges d. direct measurements of the movement of continents |
c. samples of older rock found far from mid-ocean ridges
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