Types of Volcanic Eruptions

A composite volcano _____

• is built from layers of lava and volcanic ash.

• consists primarily of cinders and volcanic rock.

• composed almost entirely of thin lava.

A cinder cone volcano _____

• is built from layers of lava and volcanic ash.

• consists primarily of cinders and volcanic rock.

• composed almost entirely of thin lava.

A shield volcano _____

• is built from layers of lava and volcanic ash.

• consists primarily of cinders and volcanic rock.

• composed almost entirely of thin lava.

A volcanic eruption can be either _____.

• explosive or gentle

• explosive or violent

• explosive or smooth

• explosive or a geyser

How is a composite volcano similar to the other types of volcanoes?

• It has gentle slopes like a cinder cone volcano and steep slopes like a shield volcano.

• It erupts gently like a cinder cone volcano and erupts explosively like a shield volcano.

• It has layers of ash like a cinder cone volcano and has layers of lava like a shield volcano.

• It has free-flowing lava like a cinder cone volcano and erupts in fragments like a shield volcano.

What is the primary cause of caldera formation during an eruption?

• emptying of the magma chamber

• explosive eruption

• rapid degassing

• mixing of mafic and felsic lavas

The eruption of a large volcano would most likely contribute to _____.

• a short-term temperature increase

• a short-term temperature decrease

• a long-term temperature increase

• a long-term temperature decrease

Which of the following is the correct order of the effects of a large volcanic eruption?

• Some of the sun's energy is blocked; gas and ash are released; the result is a cooling effect.

• Gas and ash are released; some of the sun's energy is blocked; the result is a cooling effect.

• Carbon dioxide causes the climate to warm; some of the sun's energy is blocked; the result is a cooling effect.

• Gas and ash are released; some of the sun's energy is blocked; the result is a warming effect.

Which of the following is most likely to damage the largest area?

• fissure eruption

• an eruption from a cinder cone

• an eruption that forms a caldera

• lava flows from a shield volcano