Volcanoes and Earthquakes--Review for test

When the leading edge of a dense tectonic plate meets the leading edge of a less-dense plate, the denser plate bends downward; this process is called (a)   .

Most volcanoes are found on or near __________________ _______________ because one tectonic plate is either converging or diverging away from each other, and volcanoes are created.

(a)  

_________________________ _____________________ occurs where two plates are moving away from each other, and deep cracks are opened through the crust.

(a)  

A ________________________ _____________________ is an area where material from deep within Earth's mantle rises through the crust and melts to form magma.

(a)  

The Ring of Fire is a string of (a)   volcanoes and earthquake sites around the edges of the Pacific Ocean.

--Cone-shaped volcanoes

--Tend to form tall peaks rather than rounded cones

--Made up almost entirely of fluid lava flows

--Has a low profile (looks like a shield laying on the ground)

--Simplest volcano

--Have a single vent

--Has a circular or oval cone

Which two earthquake monitoring systems monitor MAGNITUDE?

The Modified Mercalli scale measures an earthquakes's (a)   .