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Earth Science



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Across Down
3 The scientist who came up with the hypothesis about the moving apart of continents
6 This type of volcanic arc forms when oceanic-continental convergent boundaries occur
8 A place where oceanic lithosphere sinks into the mantle during subduction
10 The process of the ocean floor 'changing its skin'; the process of the new ocean floor forming along Earth's mid-ocean ridges, slowly moving outward across ocean basins, and sinking back into the mantle beneath deep ocean trenches
11 The thing that provides the basic driving forces for plate motion
12 Rocks that have the polarity that Earth's magnetic field had at the time possess...
14 The moving apart of continents
16 The longest feature on Earth's surface; seafloor spreading creates these
19 The theory that says Earth's lithospheric plates move slowly relative to each other, driven by convection currents in the mantle
1 A rising column of hot, solid mantle rock
2 The sideways and downward movement of the edge of the a plate of either oceanic or continental lithosphere into the mantle beneath another plate
4 The type boundary where two plates move together
5 This type of volcanic arc forms when oceanic-oceanic convergent boundaries occur
7 The type of boundary where two plates grind past one another
9 'All land'
13 The central part of the longest feature on Earth's surface
15 When stiff ocean lithosphere slides down into the asthenosphere that is elevated hear mid-ocean ridges
17 Sound, navigation, and ranging
18 The type of boundary where two plates move apart
20 The pulling of old oceanic lithosphere down into the mantle
 
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