Across
- 6. Record The Layers of rock deposits laid down by volcanoes or weathering that contain a record of Earth's past history.
- 9. The rigid outer layer of Earth.
- 10. Tectonics The Earth’s lithosphere is composed of seven or eight major plates and many minor plates.
- 11. Plate Earth's rigid outer crust that is broken into moving sections or plates.
- 12. Formation of rock being broken apart.
- 13. Ridge An underwater mountain system formed by plate tectonic movement.
Down
- 1. Boundary A place where two or more tectonic plates move towards each other and collide.
- 2. Drift The gradual movement of the continents across the earth’s surface through geological time.
- 3. Boundaries A place where two tectonic plates move horizontally in either direction.
- 4. Spreading A process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
- 5. Trenches long narrow depressions on the seafloor, they are the deepest parts of the oceans.
- 7. Striping At spreading centres, this crust is separated into parallel bands of rock by successive waves of emergent magma.
- 8. Boundary A place where two tectonic plates move away from each other.