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Across 2. causes oceanic lithosphere to slide down the sides of the oceanic ridge (2 words) 5. hypothesis proposed by German scientist, Alfred Wegener (2 words) 6. longest physical feature on Earth's surface (2 words) 10. sometimes are revealed as hot spots or volcanoes (2 words) 13. forms when two plates move together (2 words) 14. motion of matter resulting from convection (2 words) 15. feature in which rocks direct to their point of origin 16. supports idea of plates moving over Earth's surface (2 words) 17. deep fault structures often found along the axes of segments (2 words)

Down 1. the result of the descending plate in a subduction zone 3. process by which plate tectonics produces new oceanic lithosphere (2 words) 4. uppermost mantle+overlying crust=rigid layer (aka: lithosphere) (2 words) 7. rocks showing opposite magnetism (2 words) 8. segments in the lithosphere 9. margins where oceanic crust is being pushed into the mantle (2 words) 11. occurs due to old oceanic crust sinking into the asthenosphere (2 words) 12. means "all land"