Volcanoes Review

True or False: Earth’s crust is one solid piece.

• True

• False

Where do volcanoes usually form?

• within 10 miles of the ocean

• between Earth’s mantle and core

• at fault lines between tectonic plates

• within the boundaries of the United States

Magma is made up of ________ from the mantle mixed with hot gas.

• lava

• plasma

• hot water

• molten rock

Which part of a volcano does magma spill out of?

• base

• crater

• shield

• mantle

What is magma called when it reaches Earth’s surface?

• lava

• molt

• crater

• shield

The Hawaiian Island volcanoes were formed by a

• hot spot.

• fault line.

• meteor.

• crater.

________ volcanoes are no longer connected to a source of magma.

• Active

• Shield

• Extinct

• Dormant

What might happen if a major volcanic eruption occurred every year?

• Global temperatures might rise by several degrees.

• The earth's crust might be depleted of rocks.

• Global temperatures might cool by several degrees.

• Nothing out of the ordinary.

Hotspot volcanism is likely to be found near:

• The Ring of Fire.

• Mid-ocean ridges.

• Both the Ring of Fire and mid-ocean ridges.

• Neither the Ring of Fire nor mid-ocean ridges

Which statement about dormant volcanoes must be true?

• They can never erupt again.

• They have not erupted for a very long time.

• They will erupt within the next 12 months.

• They were formerly stratovolcanoes.