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| 3 | molten rock above the surface |   
| 6 | the force that moves earth's plates |   
| 7 | the properties of attraction |   
| 9 | a thought, conception, or notion |   
| 10 | an expert in science |   
| 11 | something that explains |   
| 12 | a natural elevation of earth's surface |   
| 15 | the theory that the lithosphere is split into many crustal plates |   
| 17 | the scientist that helped to prove the continental drift theory |   
| 18 | a long narrow elevation |   
| 19 | the bottom of the ocean |   
| 20 | a long steep-sided, narrow depression in the ocean floor |   
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| 1 | the largest layer of the earth; the plates float on top of it |   
| 2 | flowing; like a river |   
| 4 | the hard outer layer of the earth |   
| 5 | molten rock underneath the surface |   
| 6 | the movement of continents resulting from the motion of crustal plates |   
| 8 | the state of matter that can flow; not a gas or solid |   
| 13 | something that proves or disproves something else; proof |   
| 14 | a vent in earth's crust that expels lava, ash and gas comes out |   
| 16 | to stretch or open out |   
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