Post Test Topic 4 Vocabulary Quiz

Name

Class

• 1A
• 2A
• 3A

a structure that forms in earth's crust when molten material reaches Earth's surface

• lava
• magma
• volcano

a molten mixture of rock-forming substances, gases, and water from the mantle

• magma
• volcanic ash
• hot spot

an area where lava frequently erupts at the surface, independent of plate boundary processes

• outer core
• hot spot
• mantle

Once magma reaches the surface, it is known as

• molten
• lava
• a plate boundary

Also called a stratovolcano, this is made up of alternating layers of lava flows and ash falls.

• lava plateau
• magma chamber
• composite volcano

A volcano that is dead or causes very little threat of eruption is known as

• extinct
• active
• dormant

Also known as a sleeping volcano, this volcano poses little threat but could reawaken someday.

• dormant
• active
• extinct

Volcanoes that are the more immediate threat.

• dormant
• active
• extinct