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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.
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