• Features (Landforms)

• Processes/forces driving P.T.

I. DIVERGENT BOUNDARY Young, Mature, Old

Convection Cells

1. Mid Ocean Ridge

2. Volcanoes & Hydrothermal Vents

3. Processes: Ridge Push & Convection

4. Rift Valley

II. D.B. Features

MT. KILIMANJARO

O - C C – C O - O

Trench Mountains Trench

O. Crust Subducts No Subduction Oldest Crust Subducts

Volcanoes Convection Volcanic Island Arcs

Volcanoes & Earthquakes Earthquakes Slab Pull

Slab Pull Volcanoes

C.B. Features

1. Frequent Earthquakes

2.

T.B. Features

• Evidence

• Forces

I. Continental Drift Theory

• Puzzle Like Fit

• Fossils

• Rock Layers

• Ancient Glaciers

• Mountain Ranges

II. Sea Floor Spreading & Subduction

• Mid-Ocean Ridge

• Hydrothermal Vents

• Magnetic Stripes

• Age of Sea Floor

• Trenches

• Mountains

• Volcanoes

Sea Floor Age

III. Forces Driving Plate Tectonics

1. Convection Currents: The unequal heating of the

Asthenosphere creates density differences and movement, which exerts a force on the Tectonic Plates. Density example: Lava Lamp

2. Ridge Push: As the mid-ocean ridge grows gravity pushes the old lithosphere down and away from ridge.

3. Slab Pull: As the two plates collide the densest oceanic plate subducts and gravity pulls it into Asthenosphere, while pulling on the rest of the Tectonic Plate.

IV. Processes Driving P.T.

V. Magnetic Field

1. Spinning inner core

2. Convection currents: Churning outer core

3. Earth’s internal heat drives these processes

1. Protects Earth from deadly solar radiation

2. Creates the Auroras

VI. Magnetic Field