Your SlideShare is downloading. ×
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Earth structure 2 m lucente
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Earth structure 2 m lucente

869

Published on

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
869
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
29
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Earth Structure
  • 2. Four Main Layers
    Inner core
    Outer core
    Mantle
    Crust
  • 3. Crust
    Thinnest Layer
    Two types of crust :
    Oceanic: made mostly igneous rock and Basalt. Found under ocean, thin
    Continental: made mostly of granite. Found under continents, thick
  • 4. Mantle
    Located abovethe outer core
    Below the crust is where the mantle starts
    Largest Layer
    80% of Earth’s volume & 68% of Earth’s mass
    Composed of iron
    Density, Temperature, And pressure increases the deeper you go into the mantle
    Lithosphere :upper, solid part of mantle
    Asthenosphere: under lithosphere, solid rock flows very slowly
  • 5. Outer Core
    Surrounds inner core
    Temp. : 2200c-5000c
    Iron and Nickel, Liquid
  • 6. Inner Core
    Solid, iron and nickel
    Temp. can reach to 5000c
    Solid, because of the pressure put on the core
    Solid core is the source of Earth’s magnetic field
  • 7. Continental Drift
  • 8. Alfred Wegener
    First proposed the theory of continental Drift
    Continental Drift was his theory that continents were joined together then drifted apart
    Named Pangaea a supercontinent
    Theory was rejected because he couldn’t explain which force pushes or pull continents
    Found pieces of evidence:
    Geologic
    Climate
    Fossil
    1940s: Technology was developed
  • 9. Climate
    evidence in the changing climates during the past.
  • 10. Geologic
    evidence in layers of rocks across continents.
  • 11. Fossil
    Evidence of fossils are found
    in certain places
  • 12. Fossil
  • 13. Fossil
    Remains or physical evidence of an organism preserved by geological processes
    Preserved in sedimentary rock
    Sediment slows down decay
    Bones and shells are resistant to decay, more commonly preserved tissue
  • 14. Examples
    Fossils in rock
    Fossils in Amber
    Petrification
    Fossils in asphalt
    Frozen fossil
    Trace Fossil
    Mold
    Cast
    Index Fossil
  • 15. Amber
    Harden tree sap
    Bugs, lizard, and frogs
  • 16. Petrified Fossil
    A process in which minerals replace organism tissue
    Types:
    Space in bone/wood fills up with mineral
    Organisms are replaced
    by minerals
  • 17. Frozen
    Cold temperatures slow down decay
    Many frozen fossil are preserved from last ice age
  • 18. Fossil in asphalt
    Wells up in sticky, thick pools
    Traps and preserves fossil in asphalt
  • 19. Trace Fossil
    Naturally preserved evidence of animal activity
    Footprints fill with sediment
    Shows how big their
    Footprint was.
  • 20. Molds And Cast
    Mold: a cavity in a rock where a plant and animal was buried.
    Cast: an object created when sediment fills mold and becomes a rock.
  • 21. Index Fossil
    Fossils of organisms that lived during a relatively short, well-defined geologic time span.
  • 22. Geologic Time
  • 23. Geologic scale
    Divisions
    Largest division is epoch
    Second largest division- periods
    Third largest division- eras
  • 24. Eras
    Three eras:
    Cenozoic: means “New Life”
    Mesozoic: means “middle animals”
    Paleozoic: means "ancient life"
  • 25. Cenozoic
  • 26. Mesozoic
  • 27. Paleozoic

×