Earths Interior Andie
Upcoming SlideShare
Loading in...5
×
 

Earths Interior Andie

on

  • 1,457 views

 

Statistics

Views

Total Views
1,457
Slideshare-icon Views on SlideShare
1,457
Embed Views
0

Actions

Likes
0
Downloads
46
Comments
1

0 Embeds 0

No embeds

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

11 of 1

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

    Earths Interior Andie Earths Interior Andie Presentation Transcript

      • What does the inside of the Earth look like?
      • Determining the composition of the Earth
      • Scientists cannot see the interior so they must use other ways to figure it out!
      • Earthquakes have many different types of waves
        • These waves travel at different speeds through solids and liquids
        • Some waves don’t travel at all through solids
      • Measuring these waves tells us what is in the Earth’s core and where the materials change.
    •  
    • Earth Layers
      • The Earth is divided into four main layers.
        • *Inner Core
        • *Outer Core
        • *Mantle
        • *Crust
    • The Earth’s Crust
      • The crust is the thinnest layer on Earth
      • There are two types of crust
          • Oceanic crust – made mostly of the igneous rock basalt. Found under the ocean. Relatively thin.
          • Continental crust – made mostly of granite. Found under the continents. Relatively thick.
    • Special parts of the Crust
      • Lithosphere
        • Crust is the upper part of the lithosphere
        • Broken up into large plates
      • Asthenosphere
        • Upper part of mantle, below lithosphere
        • 130 – 160 km thick
        • Cooler part of the mantle that the lithospheric plates slide on top of.
    •  
    •  
    • The Earth’s Mantle
      • Located directly above the outer core
      • Starts below the crust
      • Is the largest layer
      • 80% of the Earth’s volume & 68% of Earth’s mass
    • The Earth’s Mantle
      • Composed of more iron than the crust.
      • Density, pressure, and temperature all increase the deeper you go in the mantle
      • Temperature ranges from 870 C – 2200 C
    •  
    • Special layers of the mantle
      • Lithosphere – crust plus the upper, solid part of the mantle. Forms plates.
      • Asthenosphere – just under the lithosphere. Slow moving “Silly putty” layer on which the lithospheric plates slid. (Solid rock that flows very slowly.)
    •  
    • The Earth’s Core
      • The Earth’s Core
      • Composed of the inner and outer core
      • Both are made of iron and nickel
      • How do scientists know that there is a solid inner core?
    •  
    • The Earth’s Outer Core
      • The Outer Core - Liquid
      • Surrounds the inner core
      • Temperature ranges from 2200 C – 5000 C near inner core
      • Molten (liquid) iron and nickel
    •  
    • The Earth’s Inner Core
      • The Inner Core - Solid
      • Temperature reaches 5000 C
      • Solid iron and nickel
        • Usually both would be liquid but are solid in the core because of the incredible pressure
      • The solid core is the source of Earth’s magnetic field
    • Magnetosphere
      • The inner core and outer cores do not turn at the same speed as the rest of the earth.
      • Causes a generator effect which produces a magnetic field.
      • It protects us from some of the sun’s harmful radiation.
    •  
    • What do you know about these layers?