Lesson Summary

Aftermath of earthquake, Greece, 1954. Photo courtesy of *clarity*.

Licensed CC BY.

• The Earth can be divided into layers - core, mantle, crust.

• Plates are large pieces of Earth's lithosphere that move around on top of the asthenosphere.

• There are two types of crust that make up the plates (continental and oceanic), and they have different properties.

• There are 3 types of plate boundaries: Divergent, Convergent, and Transform.

• Volcanoes and earthquakes are located at each type of plate boundary.

• Earthquakes cause 2 types of seismic waves: Body Waves and Surface Waves.

• Primary Waves (p-waves) and Secondary Waves (s-waves) are body waves.

• Rayleigh Waves and Love Waves are surface waves.

• Most, but not all, earthquakes are associated with plate boundaries.

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