| A | B |
|---|
| a. asthenosphere | plastic-like layer below the lithosphere |
| b. continental drift | idea that continents moved to their current positions on Earth by plowing through the ocean floor |
| c. convection current | motion underlying plate tectonics |
| d. convergent boundary | boundary at which plates collide |
| e. divergent boundary | boundary where plates move apart from each other |
| g. magnetometer | instrument for studying Earth’s magnetic field |
| h. Pangaea | large landmass made of all continents |
| j. plates | large sections of Earth’s crust and upper mantle |
| k. seafloor spreading | process that forms new seafloor |
| m. transform fault | place where plates slide past one another |
