Warm Up! Draw a line to match the scientist to the idea or theory he made Harry Hess Theory Plate Tectonics Alfred Wegener Sea-Floor Spreading J. Tuzo Wilson Continental Drift

Theory of Plate Tectonics Big book pg. 150 Small book pg. 32

John Tuzo Wilson Canadian scientist, studied physics 1965 – proposed the Theory of Plate Tectonics

John Tuzo Wilson Canadian scientist, studied physics 1965 – proposed the Theory of Plate Tectonics

John Tuzo Wilson Canadian scientist, studied physics 1965 – proposed the Theory of Plate Tectonics

Plate Tectonics Pieces of Earth´s crust are in slow, constant motion They move because of convection in the mantle

Plate Tectonics Pieces of Earth´s crust are in slow, constant motion They move because of convection in the mantle

Plate Tectonics Pieces of Earth´s crust are in slow, constant motion They move because of convection in the mantle

Plate Boundaries – 3 types

1. Divergent Boundaries 2 plates are moving apart   Ex: Mid ocean ridge, rift valley

1. Divergent Boundaries 2 plates are moving apart   Ex: Mid ocean ridge, rift valley

2. Convergent Boundaries 2 plates are colliding   ex: Deep ocean trench (subduction), Himalayan & Andes mountains

2. Convergent Boundaries 2 plates are colliding   ex: Deep ocean trench (subduction), Himalayan & Andes mountains

3. Transform Boundaries 2 plates are sliding past each other in opposite directions Ex. San Andreas Fault in California

3. Transform Boundaries 2 plates are sliding past each other in opposite directions Ex. San Andreas Fault in California

3. Transform Boundaries 2 plates are sliding past each other in opposite directions Ex. San Andreas Fault in California This crack in the crust created by plates moving is called a Fault

3. Transform Boundaries 2 plates are sliding past each other in opposite directions Ex. San Andreas Fault in California

Plate motion over time

Classwork Define Key terms Plate Scientific Theory Fault Rift Valley S5 Assessment #1, 2 (Due Friday)