sudden, ground shaking release of built-up energy at or under Earth's surface.process of Earth's magnetic fields moving from time to time and completely reversing its direction.layer formed when early Earth cooled, the lighter elements, such as silicon and oxygen, separated from the molten material and floated to the top.precess where new material at a ridge or rift, pushed older material aside and tectonic plates move away from the ridge.number that rates the strength of an earthquake.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |