Across
- 1. The process where a denser oceanic plate is forced under a less dense continental plate and melts in the mantle.
- 5. A chain of volcanoes formed above a subduction zone where magma rises to the surface.
- 6. The point on Earth's surface directly above an earthquake’s focus where the shaking is strongest.
- 9. The hot, liquid layer surrounding the inner core made of iron, nickel, sulphur, and oxygen.
- 11. A boundary where two plates slide past each other horizontally, causing earthquakes but no new crust formation.
- 12. A lowland region formed where continental plates diverge and the crust thins.
- 14. Circular movements of molten rock in the mantle caused by heat from radioactive decay, driving plate movements.
- 15. The thickest layer of the Earth made of semi-molten solid and liquid rock beneath the crust.
- 18. The thin, solid outermost layer of the Earth where we live, consisting of continental and oceanic types.
- 19. The semi-molten layer of the mantle beneath the lithosphere that allows plates to move.
- 20. The location beneath the Earth's surface where the earthquake originates.
Down
- 2. A boundary where two tectonic plates move away from each other, creating new crust.
- 3. An underwater mountain range formed at a divergent plate boundary where new ocean crust is created.
- 4. The rigid outer layer of the Earth, including the crust and upper mantle, broken into tectonic plates.
- 7. A boundary where two tectonic plates move toward each other, often causing subduction or mountain formation.
- 8. The energy waves produced by earthquakes that travel through the Earth.
- 10. A type of fault where two plates slide past one another, often causing earthquakes.
- 13. The hottest, solid center of the Earth composed mainly of iron and nickel.
- 16. A logarithmic scale used to measure the magnitude or strength of an earthquake.
- 17. The theory that explains the movement of Earth's lithospheric plates over the mantle.