Across
- 7. boundary/moving away from each other
- 8. boundary/moving towards each other
- 9. supercontinent that included all current land masses, believed to have been in existence before the continents broke apart during the Triassic and Jurassic Periods.
- 11. currents/a current in a fluid that results from convection
- 12. plates/the two sub-layers of the earth's crust (lithosphere) that move, float, and sometimes fracture and whose interaction causes continental drift, earthquakes, volcanoes, mountains, and oceanic trenches.
- 13. boundary/slides past each other
Down
- 1. sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
- 2. crust/thin part of earths crust that unlies the ocean basins
- 3. valley/a large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems.
- 4. drift/the separation of the continents
- 5. upper layer of earths mantle
- 6. long, narrow ditch
- 10. crust/thick part of the earths crust
- 14. wegener/discovered the continental drift