Exam 5: Volcanoes and Volcanic Hazards

Use complete sentences, correct spelling, and the information presented in chapter 5 to answer the questions below. -What type of volcano is shown in the diagram below?

Which basaltic lava flow has a relatively smooth surface?

What volcanic events formed Crater Lake, Oregon? When did they take place?

Which one of the following shows the correct order (left to right)of decreasing magma viscosity?

Which type of basaltic lava flow has its surface covered with sharp- edged, angular blocks and rubble?

Volcanic bombs originate ________.

__________is a dangerous, fast moving, hot, turbulent cloud of volcanic gases and fine- sized, pyroclastic particles.

The________ ocean basin is rimmed by the most subduction zones.

Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface?

Vents that emit only hot gases and vapors are called ___________.

The (geologically)recent volcanic activity in Yellowstone National Park is .

Which statement about the May, 1980, eruption of Mount St. Helens is FALSE?

________only emit gas.

________tend to increase the explosive potential of a magma body beneath a volcano.

A relatively small, summit depression on a volcano, marking a former eruptive vent, is a(n)__________.

Which one of the following statements is NOT true?

__________denotes a basaltic lava flow covered with angular, congealed lava rubble.

Composite volcanic cones are also known as __________.

________destroyed the city of St. Pierre, Martinique in 1902.

Another term for a volcanic mudflow is a(n)__________.