Spheres of the earth1. What is the Atmosphere?

• Layer of gases that surround the earth

1. What is the Biosphere?• The part of the earth

where life exists

2. What is the Hydrosphere?• The areas of water on

the earth

3. What is the Lithosphere?• Surface Land area of

the earth’s crust

Plate Tectonics

Pangaea - Supercontinent

Plate Tectonics

Describes the movement of the earth’s lithosphere.

Layers of the earth

Convection

The movement of hot and cool mantle moving in the earth causing plates to move.

Convection and plates

Strike – Slip/Faulting

Grinding or sliding past each other creating cracks in the earth’s crust. San Andreas Fault

San Andreas Fault

Divergent boundaries

Where plates are coming apart. Mid – Atlantic Ridge and Great Rift Valley

Mid – Atlantic Ridge

Convergent boundaries Plates crashing into each other. There can be several forms:

Rocky Mountains and Himalayas

Continental and Continental

Ocean and Ocean

Ocean and Continental

Subduction

When a sea plate collides with a continental plate.

The sea plate goes under the continental plate.

Ring of Fire

Marks the boundary where two plates meet causing many earthquakes and volcanoes.

Ring of Fire