Bell Ringer

• What are the five physical layers of the Earth?

• Give 3 interesting facts that you have learned about the layers of the Earth.

Plate Tectonics

Ms. Sikes

Plate tectonics

• Plate tectonics is the theory that the Earth’s lithosphere is divided into tectonic plates that move around on top of the asthenosphere.

• Tectonic plates are large, rigid pieces of the lithosphere. There are 7 total tectonic plates on Earth.

PLATE BOUNDARIES

• A plate boundary is defined as where tectonic plates touch. There are three different types of boundaries, which are called convergent, divergent, and transform.

• Different land forms and/or natural disasters can occur at plate boundaries.

CONVERGENT BOUNDARIES

• When two plates collide. • There are three types of convergent

boundaries– Continental-Continental– Continental-oceanic boundaries– Oceanic-oceanic boundaries

DIVERGENT BOUNDARIES

• When two place separate.

• Results in new sea floor forming at mid-ocean ridges.

TRANSFORMING BOUNDARIES

• When two plates slide past each other horizontally.

• Results in fault lines and earthquakes

Assignment

• Identify the three types of plate boundaries

• Explain what is occurring at each of the boundaries

• Draw a picture showing the movement of the plates in the boundary.