from pangea to plate tectonics l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
From Pangea to Plate Tectonics PowerPoint Presentation
Download Presentation
From Pangea to Plate Tectonics

Loading in 2 Seconds...

play fullscreen
1 / 11

From Pangea to Plate Tectonics - PowerPoint PPT Presentation


  • 517 Views
  • Uploaded on

From Pangea to Plate Tectonics. Earth’s Plates In Motion Andrew Flint August 8, 2002. Contents. What is Pangea? The theory of Continental Drift Seafloor Spreading What is Plate Tectonics? Timeline Questions Ideas for further study Bibliography. Pangaea.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'From Pangea to Plate Tectonics' - ofira


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
from pangea to plate tectonics

From Pangea to Plate Tectonics

Earth’s Plates In Motion

Andrew Flint

August 8, 2002

contents
Contents
  • What is Pangea?
  • The theory of Continental Drift
  • Seafloor Spreading
  • What is Plate Tectonics?
  • Timeline
  • Questions
  • Ideas for further study
  • Bibliography
pangaea
Pangaea
  • The word “Pangaea” means “all land”
  • Scientists believe that the continents once looked like this:
alfred wegner and the theory of continental drift
Alfred Wegner and the Theory of Continental Drift
  • In 1912 Alfred Wegner theorized that the continents had once been together and had “drifted apart. They fit together like puzzle pieces.
  • Rock formations, climate similarities, and plant & animal species gave further evidence.
seafloor spreading
Seafloor Spreading
  • In the 1950’s scientists began to look at the ocean floor for evidence of this movement.
  • They noticed deep sea trenches and rifts.
  • Age Evidence and Magnetic Clues provided further evidence that Wegner had been correct!
plate tectonics
Plate Tectonics
  • In the 1960’s scientists theorized Plate Tectonics.
  • Earth is made of 10 plates that “slide” around on the plastic-like layer of the earth below the crust called the asthenosphere.
plate boundaries
Plate Boundaries
  • Convergent- Plates collide…volcanoes, mountains
  • Divergent- Plates move apart…ridges, rift valleys
  • Transform- Plates slide past one another…earthquakes
timeline
Timeline
  • 1912 Alfred Wegner-Continental Drift
  • 1950’s Seafloor Spreading
  • 1960’s to present- Plate Tectonics
do you remember
Do You Remember?
  • 1. Define Pangaea.
  • 2. Describe Wagner’s theory.
  • 3. What evidence is there of Seafloor Spreading?
  • 4. Describe Plate Tectonics.
  • 5. Name and describe the 3 Plate Boundaries.
i d like to know more
I’d Like To Know More…
  • How much do the plates move in a year?
  • Which direction are we moving in?
  • Can we stop the movement? (earthquakes)
bibliography
Bibliography
  • Earth Science, Glencoe/ McGraw Hill. Columbus, Ohio, 2001
  • Research and images , http://www.enchantedlearning.com