The speed and behavior of these waves change as they encounter layers of different densities. They’ve plumbed it by studying how earthquake waves travel through the planet. Still, scientists know a great deal about Earth’s inner structure. In fact, the deepest humans have ever drilled is just over 12 kilometers (7.6 miles). Except for the crust, no one has ever explored these layers in person. They are, from deepest to shallowest, the inner core, the outer core, the mantle and the crust. Starting at the center, Earth is composed of four distinct layers. To really understand Earth, you need to travel 6,400 kilometers (3,977 miles) beneath our feet. Yet even the deepest canyon is but a tiny scratch on the planet. Earth’s surface is an amazing place to behold.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |