Earth’s layers
Upcoming SlideShare
Loading in...5
×
 

Earth’s layers

on

  • 1,138 views

 

Statistics

Views

Total Views
1,138
Views on SlideShare
737
Embed Views
401

Actions

Likes
0
Downloads
5
Comments
0

2 Embeds 401

http://harveygms2.blogspot.com 351
http://www.harveygms2.blogspot.com 50

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Earth’s layers Earth’s layers Presentation Transcript

  • Earth’s Layers
  • Crust Outer most layer Thinnest 5 to 100 kilometer (km) thick Temperatures range from 0° C to 1000°C
  • Crust Composition: mostly silicon, oxygen, sodium, small amounts of magnesium, potassium, and iron.
  • Crust “Two Types”Continental Crust Thickestup to 100 km at mountains Most abundant rock is granite
  •  Oceanic Crust Asthin as 5 km Most abundant rock is basalt Density averages 3g per cm³
  • Crust/MantleMohorovicic Discontinuity (Moho): Transitionboundary between the crust and mantle
  • Crust/MantleMohorovicic Discontinuity (Moho): This boundary marks a significant change in chemical composition.
  • Mantle 67% of Earth’s mass 2,900 km thick Temperature ranges from 1000° C to 3700 ° C
  • MantleDensity averages from 4.3g to 5.4g per cm³Composition: mostly silicon, oxygen, magnesium, and iron
  • Mantle Convection currents occur here
  • MantleDivided into 3 layers: 1. Lithosphere 2. Asthenosphere 3. Mesophere
  • Mantle Lithosphere: 10 to 300 km thick Solid and made up of crust and mantle material VERY rigid Divided into sections called plates
  • MantleAsthenosphere 250 km thick Soft layer that allows plates to shift
  • MantleMesosphere 2550km thick Lower part of the mantle
  • CoreDivided into 2 layers: 1. Outer Core 2. Inner Core
  • CoreOuter Core Liquid 2200 km thick
  • CoreOuter Core: Composition: Iron and Nickel, 10% sulfur and oxygen
  • CoreOuter Core: Density: 10g to 12g per cm³ Temperature: 4000° to 5000° C
  • CoreInner Core: Solid 1230 km thick About 6380 km beneath Earth’s surface
  • Core Inner Core: Composition: Iron and Nickel Density: 15 g per cm³ Temperature: 5000° to 6000° C
  • Earth’s Layers Scientistsuse indirect methods to gain information and knowledge of Earth’s interior (example: earthquakes).
  • Earth’s Layers Seismic waves from earthquakes travel at different speeds depending on the density and composition of the ground they move through.
  • Earth’s LayersScientists are able to take this information and learn about the interior of Earth.