1 / 20

Internal Forces of the Earth

Internal Forces of the Earth. 4 layers of earth 1-crust Where people live; continents stuck into crust 2-mantle “hot liquid rock-magma”; like hot caramel 3-outer core 4-inner core. Plate Tectonics. Crust is divided into stiff, moving plates. RING OF FIRE.

bradford-jerry
Télécharger la présentation

Internal Forces of the Earth

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. Internal Forces of the Earth • 4 layers of earth • 1-crust • Where people live; continents stuck into crust • 2-mantle • “hot liquid rock-magma”; like hot caramel • 3-outer core • 4-inner core

  2. Plate Tectonics • Crust is divided into stiff, moving plates

  3. RING OF FIRE • AREA IN PACIFIC WHERE PLATE IS THINNER • MORE EARTHQUAKES & VOLCANOES

  4. VOLCANOEhttp://www.volcano.si.edu/world/region.cfm?rnum=13S BY REGION

  5. 3-MIDDLE OF PLATE • LESS INTERNAL FORCES—HEAT & PRESSURE • MORE EXTERNAL FORCES-WIND & WATER

  6. EXAMPLE OF SPREADING-- Plate A Plate B

  7. Mid Oceanic Ridge “underwater Volcano” Sea floor spreads

  8. Plate movement • FOLDING

  9. PLATES COLLIDING 2 • FAULT- PLATE CRACKS & MOVES

  10. Trench Creation—SUBDUCTIONSMALLER PLATE GOES UP/BIG PLATE GOES DOWN

  11. TRANSFORM—PLATES SLIDE PAST

  12. EARTHQUAKE ZONESPLATES SLIDE PAST EACH OTHER

  13. Results of internal forces • Types of landforms created • Mountains, valleys, volcanoes, islands • What do they look like? • Higher, jagged, steep slopes • Primary landforms • Created by heat & pressure, plate movement

  14. EXTERNAL FORCES • Rock weathering • Water • -breaks rock down • Transports rock

  15. wind • Transports rocks & minerals • Breaks down rocks (2 rocks run into each other0 • Creates sand dunes

  16. glaciers • Heavy ice • Flattens land • Picks up sediment • Leaves some parts behind as it moves • Creates: • Plains • Fertile land • Carves out rivers • Leaves ice that will melt to become lakes

  17. Results of external forces • TYPES OF LANDFORMS • Plains, plateaus, alluvial fans, deltas, • LOOK LIKE? • Lower in elevation, rounded, smaller • SECONDARY • Created by external forces like wind, water, glaciers

  18. Continental drift theory • PANGAEA Evidence #1 -Jigsaw Puzzle All continents Seem to fit together

  19. EVIDENCE • 2-fossil remains

  20. Evidence #3-sea floor spreadinghttp://www.tectonics.caltech.edu/outreach/animations/drift.html • Sea floor spreading

More Related