Chapter 8 - Volcanoes Review

A ______ results when an empty magma chamber collapses.

• crater

• caldera

Volcanoes made from alternating layers of lava and pyroclastic material are called ______

• cinder cone volcanoes

• composite volcanoes

Portions of tectonic plates that are located above magma plumes are called

• rifts

• hot spots

______ takes many forms, including volcanic bombs, volcanic blocks, and ash.

• Magma

• Pyroclastic material

Where are volcanoes most likely to form?

• in deep canyons

• along plate boundaries

• near the center of continents

• in mountainous areas

Lava that is very runny probably

• comes from explosive volcanoes

• is hotter than most lava

• has a low silica content

• has been cooled below the surface

Which of the following is not considered when predicting volcanic eruptions?

• changes in the cone's slope

• atmospheric humidity

• internal temperature

• seismic activity

Tags

NGSS.MS-ESS3-2

As you move west through the Hawaiian Islands, the age of the islands increases. the older islands are west of the newer islands because

• aged faster than those to the east

• were made of less lava than the eastern islands

• formed first and then moved away from the hot spot

• were formed from old, recycled, silica-rich magmas

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

_______ forms when the pressure on very hot rock decreases

• Pyroclastic material

• Magma

To help predict eruptions, scientists often rely on _____ based on rock samples.

• Models

• Seismograms

Tags

NGSS.MS-ESS3-2