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1. - created where two or more of Earth's tectonic plates are pushed together.
6. - hot fluid or semi-fluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling.
7. - The central or innermost portion of the Earth, lying below the mantle
8. - break apart or become separated through faulting caused by plate tectonics.
11. - the relatively thick part of the earth's crust which forms the large land masses.
13. – The layer beneath earth’s crust
14. - hot molten or semi-fluid rock erupted from a volcano
16. – the instrument that detects the seismic waves from an earthquake
18. - a sudden violent shaking of the ground, typically causing great destruction
20. – when the plates are moving apart from one another.

2. - a long, high sea wave caused by an earthquake or other disturbance
3. - What’s a deep channel in the ocean floor where crust is sinking downwards called
4. - the upper layer of the earth's mantle, below the lithosphere,
5. - a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere.
9. - the outermost shell of a terrestrial planet.
10. - the gradual movement of the continents across the earth's surface through geological time.
12. – The depression in the ocean floor
15. - an opening in a planet through which molten rock, hot gases, and other materials erupt.
17. - the point on the earth's surface vertically
19. - the point where light rays originating from a point on the object converge.