Across
- 3. the process by which new oceanic lithosphere (sea floor) forms when magma rises to Earth's surface at mid-ocean ridges and soilidifies, as older, existing sea floor moves away from the ridge
- 6. the process by which earth's magnetic north pole and magnetic sounth pole switch positions periodically; a change in the direction in which earth's magnetic field points.
Down
- 1. the process by which one lithosphere pplate moves beneath another plate as a result of tectonic forces
- 2. any movement of mater that results from differences in density; may be vertical, circular, or cyclical
- 4. tectonics the theory that earth's outer layer is made up of large, moving pieces called tectonic plates; the theory explains how plattes interact and how those interactions relate to processes such as earthquakes and mountain building.
- 5. the hypothesis that single large landmass broke up into smaller landmasses to form the continets, which then drifted to their present locations; the movement of continents