Across
- 2. ranges – chains of mountains related in origin and age.
- 6. waves – seismic waves that travel through Earth's interior.
- 9. – tall, steep volcanoes with a cone-shaped peak.
- 10. core – the layer beneath the mantle.
- 11. boundaries – boundaries where two tectonic plates move away from each other.
- 13. mountains – mountains formed from the erosion of a plateau.
- 14. – the study of earthquakes and Earth's internal structure.
- 17. – locating the exact point on Earth's surface above the focus.
- 18. – a series of seismic waves traveling through Earth.
- 21. volcanoes – volcanoes with broad, gently sloping sides.
- 22. waves – the most damaging type of surface wave.
- 23. – the longest continental mountain range in the world.
- 24. – layer made of molten iron and minerals that can flow.
- 25. waves – surface waves causing a rolling, elliptical motion.
- 27. – the point inside Earth where an earthquake starts.
Down
- 1. ridges – underwater mountains where new ocean crust forms.
- 3. boundaries – boundaries where plates slide past each other.
- 4. core – the deepest layer of the Earth.
- 5. boundaries – boundaries where plates move toward one another.
- 7. mountains – mountains formed when magma pushes up but does not erupt.
- 8. – the Earth's outermost layer.
- 9. – an instrument that measures and records earthquake details.
- 12. – large, rigid slabs of solid rock in the Earth's lithosphere.
- 15. tectonics – theory explaining the movement of Earth's lithosphere.
- 16. mountains – mountains formed when tectonic plates push together.
- 18. – the point on Earth's surface directly above the focus.
- 19. – landforms where molten rock, ash, and gas escape from Earth.
- 20. – the highest mountain range in the world.
- 21. waves – waves radiating from an earthquake through Earth's interior.
- 26. Volcanic Arc – a chain of volcanoes in the Philippines.