1. Evidence for Plate Tectonics

2. Earth’s Interior  By composition  core - Fe & Ni  mantle  crust  By composition  core - Fe & Ni  mantle  crust lithosphere asthenosphere  By state  inner core - solid  outer core - liquid  lower mantle - ductile solid  asthenosphere - ductile solid  lithosphere - rigid solid

3. Plate Tectonics  The earth’s surface is made of plates that move and interact.  plates are rigid lithosphere  most activity is at the margins of the plates  the plates are the surface  The earth’s surface is made of plates that move and interact.  plates are rigid lithosphere  most activity is at the margins of the plates  the plates are the surface

4. Fit of the Continents

5. Fossil distribution Igneous & sedimentary rocks geologic structures Igneous & sedimentary rocks geologic structures Glacial Deposits

6. Seafloor Spreading Age of the seafloor (measured with riometric dating, paleomag, sed thickness) Shape of the seafloor

7. Locations of Geologic Activity earthquakes volcanoes

8. Hot Spots

9. Measured Movement

11. Causes of Motion  mantle motion  slab pull  ridge push  mantle motion  slab pull  ridge push

12. History of plate movement