Across
- 2. the Ring of Fire is in this ocean
- 4. Neanderthals primarily inhabited this continent
- 5. rupture in Earth's crust allowing hot lava, ash, and gases to escape
- 8. first continent inhabited by humans
- 9. ocean between Europe & Africa on the east and The Americas on the west
- 12. layout of an archaeological excavation site marked with intersecting lines
- 13. number of continents on Earth
- 15. extinct ancient species of human
- 17. ancient species of human that evolved into sapiens
- 18. smallest, shallowest, and coldest ocean on Earth
- 20. sudden shaking of the ground caused by seismic waves in Earth's surface
Down
- 1. layer of rock between the crust and core making up 84% of the Earth's volume
- 3. land bridge first crossed by humans to get from Siberia to North America
- 6. first continent inhabited by humans after leaving Africa
- 7. only surviving species of humans
- 10. Australia sits on this tectonic plate
- 11. last present-day country inhabited by early humans
- 14. thick outer shell of rock less than 1% of Earth's volume
- 16. present-day state USA first inhabited by sapiens
- 19. very hot and dense center of Earth with solid and liquid parts