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Across 5. It is a type of surface wave that is small and moves in rolling motion. 6. It is a rigid layer in the Earth consisting of the crust and the upper part of the mantle. 7. It is a type of wave that moves the fastest and is the first to be recorded by a seismometer. 9. A boundary where two plates are moving towards each other. 11. A device that measures seismic waves. 13. It is a type of surface wave that can’t travel through water. 14. A boundary where two plates are moving apart. 15. When one plate slides under another and into the mantle.

Down 1. A natural phenomenon/disaster caused by plate movement. 2. It is a boundary that concerns two plates sliding past each other. 3. It is directly above the focus. 4. It is a layer in the Earth that lies below the lithosphere and is made of highly viscous, molten rock. It is also where convection occurs. 8. It causes the continents to move (CLUE: it is related to heat) 10. It is a type of transverse wave and can only travel through solid rock. 12. It is where the plates slip and always occurs on a fault line.