Volcanoes

A volcano that will never erupt again is

extinct

To learn more about why his pumice sample was shrinking, Ben Kennedy studied

foam.

Volcanoes release a hazy smoke called

vog

Which statements accurately describe volcanic landforms? Check all that apply.

A. Batholiths cooled deep inside Earth. B. A geyser spouts water that is heated deep inside Earth.

Which statements accurately describe hot spots? Check all that apply.

A. Hot spots can cause volcanoes. B. Hot spots can cause geothermal activity like geysers and mud pots. C. The Hawaiian Islands formed over a hot spot. E. Yellowstone National Park is a geothermal hot spot.

How do volcanoes function as a disruptive force? Check all that apply.

A. force people to flee their homes C. pollute the air with volcanic smoke E. make airplanes fly around ash clouds

Which tasks does a volcanologist do to study volcanoes? Check all that apply.

A. use autoclaves to imitate the interior of a volcano B. simulate volcanic explosions with computer programs C. study lava samples D. listen to the sounds of the interior of a volcano

Which statements about plate tectonics and subduction are true? Check all that apply.

B. In subduction, one plate slides under another. C. Earth's plates carry both water and land. D. Two plates meet at a plate boundary.

David Fee studies sound waves so deep and low that humans cannot hear them. What are these low frequencies called?

D. infrasound

Mount Aetna on Sicily is a(n) ________ volcano because it produces earthquakes and lava flows.

active

This material is similar to pumice because both are full of air

bubbles.

Steven Businger helped develop a ______________ that predicts how this smoke spreads.

computer model

As magma rises, pressure _______________, causing dissolved gases to expand and form bubbles. The size of the bubbles increases, exerting a lot of force. The force of the expanding gases pushes the magma from the _______________ up through the _________. Molten rock and gas explode through the ________, which is at or near the top of the volcano.

decreases, magma chamber, pipe, vent

This volcano is __________, having no activity since its last eruption in 1707.

dormant

To model the smoke conditions, scientists measure the amount of ________________ gas a volcano is spewing.

sulfur dioxide

Kennedy found that the shrinking had to do with molten rock's surface _________, which is the force that holds a droplet of water together.

tension