Across
- 3. A piece of homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces
- 4. The remains of a prehistoric organism preserved in petrified form or as a mold or cast in rock
- 7. Hot fluid or semi fluid material below the earth's crust
- 11. An explosion of steam and lava from a volcano
- 13. The branch of science concerned with earthquakes and related phenomena
- 15. When two tectonic plates converge (making mountains, volcanoes, or seafloor trenches)
- 16. Atoms of the same element with a different number of neutrons
- 18. The shaking of Earth's Surface, usually caused by tectonic plate movement along fault lines
- 19. Innermost layer of the earth
- 20. A fracture in the earth’s crust where rock blocks move relative to each other
Down
- 1. A series of long ocean waves generated/triggered by a large and sudden displacement of the ocean floor
- 2. A mountain or hill that has a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted
- 5. Super-continent that existed 200-300 million years ago and consisted all of earth’s land
- 6. Second layer and thickest layer of the earth
- 8. Outermost layer of the earth
- 9. Liquid layer of the earth between the mantle and inner core
- 10. An opening on Earth's surface where lava, tephra, and gasses erupt/release
- 12. The sliding down of a mass of earth or rock from a mountain or cliff
- 14. Hot molten or semi-fluid rock erupted from a volcano or fissure
- 17. A landmass made up of most or all of earth’s land