• seafloor spreading: Mechanism for moving continents. The formation of new seafloor at spreading ridges

pushes lithospheric plates on the Earth’s surface.
6.3
• epicenter: Point on the Earth’s surface directly above the focus of the earthquake.

• plate: Slab of Earth’s lithosphere that can move around on the planet’s surface.

• seismometer: Equipment that measures seismic waves and other ground motions.
6.4
• convection cell: Hot material rises and cool material sinks in a circular pattern.

• seafloor spreading: Mechanism for moving continents. The formation of new seafloor at spreading ridges

pushes lithospheric plates on the Earth’s surface.
6.5
• plate boundary: Location at which two plates come together.