1 / 9

Understanding the Earth's Geosphere: Layers, Composition, and Structure

The geosphere of Earth consists of five main layers: the crust, mantle, outer core, and inner core. The crust is a thin outer layer, only 1% of Earth's mass, ranging from 5-100 km thick, with two types: oceanic (basalt) and continental (granite). Beneath the crust lies the mantle, a 2880 km thick layer. The outer core is a molten layer comprised mainly of iron and nickel, while the inner core is solid, incredibly dense, and reaches temperatures of about 7204°C. Understanding these layers allows us to grasp Earth's physical structure and the dynamics of tectonic plates.

kamaria-gyasi
Télécharger la présentation

Understanding the Earth's Geosphere: Layers, Composition, and Structure

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Inside the Earth The Geosphere

  2. Composition (What it is made of) • Crust • Mantle • Core • Inner • Outer

  3. Outer layer 1% of Earth’s mass 5-100 km thick (2 – 25 miles) Equal to a piece of paper on a basketball 871 C (1600˚ F) 2 types of crust Oceanic (very dense, made of basalt) Continental (less dense, made of granite) The Crust

  4. Oceanic and Continental Crust

  5. Middle layer 2880 km thick layer (1800 mi) Up to 4426 C (8000 ˚ F) The Mantle

  6. The Core • Made mostly of iron and nickel • Outer core • 2240 km thick (1400 mi) • 6093 C (11,000 ˚ F) • Movement is source of Earth’s magnetic field • Inner core • solid • 1280 km thick (800 mi) • 7204 C (13,000 ˚ F) • 1/3 of the earth’s mass

  7. How are the earth’s layers similar to an egg? Shell=crust Egg white=mantle Yolk=core Earth’s Layers

  8. Physical Structure of the Earth(5 Layers) • Lithosphere- rigid outer layer (crust) • Asthenosphere- upper layer of mantle, solid rock that flows slowly (like hot asphalt) • Mesosphere- lower layer of mantle • Outer Core- liquid layer • Inner Core- solid, very dense

  9. Tectonic Plates • Earth’s crust is broken into about 19 pieces called tectonic plates • These plates move on top of the asthenosphere

More Related