Volcanism

The semi-molten rock underneath a volcano is called ____________

• geyser

• lahar

• lava

• magma

Active volcanoes are most likely to be found ___________

• in convergent boundaries

• in the Pacific Ring of Fire

• where tectonic plates pull apart

• in transformed boundaries

Tags

NGSS.MS-ESS3-2

When magma is thick with more dissolved gas, we can expect the volcanic eruption to be a/an _______

• oozing ash and lava

• lava frothing over the crater

• spewing water like a geyser

• violent ejection of ash and lava

Which of the following formations would most likely result from a single violent volcanic eruption?

• caldera

• shield volcano

• stratovolcano

• cinder cone

What is a volcano?

• The movement of the Earth's crust by the movement of plate boundaries

• A mountain created by the folding of the Earth's crust

• A cone-shaped mountain or hill formed by eruptions of lava and ash

• A landform that extends above the surrounding terrain

The "Ring of Fire" is a volcanic island arc extending from the southwestern Pacific through Indonesia. The island arc formed as a result of ________ collision.

• oceanic plate-continental plate

• oceanic plate-oceanic plate

• continental-plate-continental plate

• terrane-craton

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Molten rock that pours forth on Earth's surface is called

• metamorphic.

• magma.

• lava.

• pyroclastics.

Small conical-shaped hills with truncated tops that formed during moderately explosive volcanic eruptions are known as

• cinder cones.

• craters.

• calderas.

• domes.

Tags

NGSS.MS-ESS2-2

Large, basin-shaped depressions that form when summit materials on a volcanic mountain collapse inward after an eruption or loss of magma are known as

• cinder cones.

• craters.

• calderas.

• domes.

Tags

NGSS.MS-ESS2-2

Which of the following most completely defines a volcano?

• a cone-shaped structure on land where pyroclastic material is ejected

• a partly molten region of Earth's mantle where subducting rock is melted

• a ridge system between two diverging plates through which magma escapes

• a vent or hole in Earth's surface through which magma or ash escapes