Earth’s Moving Surface Plate Tectonics Earth’s Moving Surface

Earth’s Crust is Made of Many Pieces The pieces are called plates

Today we will learn about: The plates How they move How they interact

MAGMA Review: The Earth is made of layers. The solid layers include: The Crust The Mantle The Core The upper Mantle is also made of some crust Beneath the Crust is the Asthenosphere. The Asthenosphere is made of…. MAGMA

Remember:

In some places the crust is thicker.

How do the plates move? The plates sit on top of the Asthenosphere The Asthenosphere moves because of convection.

Convection Convection is the transfer of heat by the motion of or within a fluid. The basic premise behind convection is that heated matter becomes more buoyant and "rises"; while cooler material "sinks".

Earth’s Convection in the Mantle The magma closer to the core heats up and rises. As the magma rises closer to the crust, it cools, and then sinks back toward the core. Like a conveyor belt the plates move on the magma.

Brittle Crust Floats on Flowing Asthenosphere

Plate Interaction 3 types of interaction Divergent Convergent Transform

Divergent Plate Boundaries When two plates move away from each other.

Convergent Plate Boundaries When two plates bump into each other.

Transform Plate Boundaries When two plates slide against each other.

The 3 Types of Boundary Movement

AZ Standard and Objectives: Concept 1: Structure of the Earth PO 2. Describe the properties and the composition of the following major layers of the Earth: crust mantle core PO 3. Explain the following processes involved in the formation of the Earth’s structure: plate tectonics Concept 2: Earth’s Processes and Systems PO 4. Explain lithospheric plate movement as a result of convection