Across
- 3. Boundary- A plate boundary where two plates move toward each other
- 4. The layer of hot, solid material between Earth’s crust and core
- 6. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
- 9. - The soft layer of the mantle on which the lithosphere floats
- 11. A device that determines the distance of an object under water by recording echoes of sound waves.
- 12. drift- The hypothesis that the continents slowly move across Earth’s surface.
- 13. Boundary- A plate boundary where two plates move past eachccc other in opposite directions.
Down
- 1. The name of the single landmass that broke apart 200 million years ago and gave rise to Today’s continents,
- 2. current- The movement of a fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another.
- 5. A rigid layer make up of the uppermost part of the mantle and the crust
- 7. Tectonics- The theory that pieces of Earth’s lithosphere are in slow, constant motion driven by convection currents in the mantle
- 8. Boundary- A plate boundary where two plates move away from each other
- 10. - The transfer of energy through space
- 11. waves- vibrations that travel through Earth carrying the energy released during an earthquake.
- 14. spreading- The process by which molten material adds new oceanic crust to the ocean floor.