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## Plate tectonic theory - **Pacific Plate & North American Plate** - **South American Plate & African Plate** - **African Plate & Arabian Plate** - **African Plate & Antarctic Plate** - **North American Plate & Eurasian Plate** ### 3. Transform fault Boundary - **Pacific Plate & Nazca Plate** - *...

## Plate tectonic theory - **Pacific Plate & North American Plate** - **South American Plate & African Plate** - **African Plate & Arabian Plate** - **African Plate & Antarctic Plate** - **North American Plate & Eurasian Plate** ### 3. Transform fault Boundary - **Pacific Plate & Nazca Plate** - **Nazca Plate & Cocos Plate** - **Pacific Plate & North American Plate** Plates are moving slowly - slowly constantly - **Geologic events & features** - Plates are moving at a speed that has been estimated at 1 to 10 cm per year. ### **Convection Current** - Result of differential heating - **Warm material rises - less dense** - **Cool material sinks - denser** - Plate dragged by a convention ### **Ridge Push** - Atmosphere, water, mantle of earth - Plate push by the weight of a mid-ocean ridge ### **Slab Pull** - Plate pulled by the weight of its cold, dense subduding current ### **Divergent** - Separate →← ### **Convergent** - Moving towards ### **Transform** - Moves to side →← - Each other