7.2A Vocabulary Review

a large volcanic crater, formed by the collapse of the volcano summit as the result of a major eruption.

• fumerole

• fissure vent

• caldera

• shield volcano

Melted rock that is emitted from a volcano or vent and flows onto the surface: also refers to the hardened rock that forms as it cools.

• magma

• lava

• caldera

• crystals

a vent or opening on a volcano that releases high temperature steam adn gases.

• eruption

• fissure vent

• fumarole

• caldera

the emission of volcanic products such as lava, ash, and gases from a volcano; as a geologic process, volcanic eruptions usually occur as sudden events.

• fissure

• eruption

• ash

• gas

small solid particles that are emitted from a volcano during an eruption into the atmosphere.

• volcanic ash

• plume

• magma

• lava

a steep-sided, often cone-shaped volcanic peak, formed by layers of ash, relatively sticky lava and other eruption products.

• shield cone

• composite cone

• stratovolcano

• caldera

a linear volcanic vent or vents through which lava and gases erupt, usually without any explosive activity.

• fumarole

• caldera

• fissure vent

• eruption

solid surface of the Earth (including the seafloor beneath the oceans)

• matle

• crust

• magma chamber

energy from the mantle moving towards the crust and changing the physical properties of earth materials (melting) and escaping on Earth's surface (crystallization)

• melting

• crystallization

• magma flow

• flow of energy

the melted material from the mantle and crust while it is beneath the surface of the earth.

• magma

• lava

• volcanic ash