Continental Drift Liz LaRosa for use with my 5th Grade Science Class http://www.middleschoolscience.com 2009

Alfred Wegener Proposed the the hypothesis of continental drift.

Continents used to be together.

Pangaea: the super continent Greek word for “all Earth”

The earth split again

Pangaea

Pangaea Evidence

Evidence of Pangea

Tectonic Plates

How Plates Move http://pubs.usgs.gov/gip/dynamic/unanswered.html

Plate Tectonics Greek – “tektonikos” building Pieces of the lithosphere that move around Each plate has a name Fit together like jigsaw puzzles Float on top of mantle similar to ice cubes in a bowl of water

Review Name the 3 main layers of the Earth What is a tectonic plate? Who the hypothesis of proposed continental drift? What was Pangea? Name 3 evidences for continental drift.

Stop here!!

Sea Floor Spreading

Sea Floor Spreading Mid Ocean Ridges – underwater mountain chains that run through the Earth’s Basins Magma rises to the surface and solidifies and new crust forms Older Crust is pushed farther away from the ridge

Different Types of Boundaries http://pubs.usgs.gov/gip/dynamic/understanding.html

Divergent Boundary – Arabian and African Plates Arabian Plate Red Sea African Plate

Divergent Boundary – Iceland http://pubs.usgs.gov/gip/dynamic/understanding.html

Divergent Boundary - Oceanic http://www.geology.com

Divergent Boundary - Continental http://www.geology.com

Convergent Boundary – Indian and Eurasian Plates Indian Plate

Convergent Boundary – Oceanic & Continental http://pubs.usgs.gov/gip/dynamic/understanding.html & http://www.geology.com

Convergent Boundary – Oceanic & Oceanic Note – plates are reversed http://pubs.usgs.gov/gip/dynamic/understanding.html & http://www.geology.com

Convergent Boundaries - Continental http://pubs.usgs.gov/gip/dynamic/understanding.html & http://www.geology.com

Transform Boundary – San Andreas Fault www.geology.com