Chapter 8 Plate Tectonics Earth has plates??? The formation, movement and interactions of earth’s plates Rigid moving pieces of Earth’s crust, called……….

Lithosphere Asthenosphere Rigid, moving pieces of Earth’s crust and upper mantle Partially melted layer on top of which the lithosphere moves

Continental drift Theory proposed by Alfred Wegener stating that the continents moved or drifted from one location to another over a period of time

Common fossils on South America and Africa MESOSAURUS Evidence????

Location of Earthquakes and Volcanoes…. Located along plate boundaries Ring of Fire….ring of volcanoes & earthquakes around the Pacific Ocean

Types of Plate Boundaries 4 types of plates boundaries… Divergent Convergent/collision Subduction Transform/sliding

2 plates are moving apart Mid-ocean ridge Divergent Feature formed?

Example – Mid-Atlantic Ridge

Convergent/collision Feature formed? 2 plates slam together Mountains and mountain ranges

Example - Himalayas

Subduction Feature formed One plate moves underneath another plate Trench

Example – Marianas Trench & Peru-Chile Trench

The denser one (ocean) It melts! Ocean- ocean plate Ocean – continental plate Which plate subducts? What happens to it? The denser one (ocean) It melts!

Transform/sliding Feature formed? 2 plates slide past each other Fault, like San Andreas

Example – San Andreas