category 1
Small solid particles that are emitted into the atmosphere from a volcano during an eruption.
volcanic ash
The melted material from the mantle and crust while its beneath the surface of the earth.
Magma
A vent or opening on a volcano that releases high temperature steam and gases
Fumarole
A major area on the edges of the pacific ocean floor where many earthquakes occur.
Ring of fire.
The movement of material from the mantle and crust, upwards through the crust and to the earths surface driven by the flow of energy.
Cycling of matter.
A scientific theory that the earths solid outer crust is made of individual ocean and continental plates that move slowly over the mantle layer.
plate tectonics.
A divergent (plates moving apart) boundary within an ocean plate where new seafloor is created. marked by a disruption of earths surface into a mountain range with high thermal energy flow and volcanic and earthquake activity.
Mid ocean ridge
Th emission of volcanic products such as lava, ash, gases from a volcano usually occur as sudden events.
Eruption
The solid surface of the earth included the sea floor under the ocean
crust
A broad, dome shaped volcano with gently sloping sides formed by layers of relatively fluid lava
Shield volcano
Melted rock that is emitted from a volcano or vent and flows onto the surface; also referred to the hardened rock form as it cools.
Lava
Thick crust with large areas of land. ( north/south america, and Asia)
continent
A tectonic region where a continental or oceanic plate is splitting apart and new plate material is created.
Divergent boundary
The region in the crust beneath a volcano were magma is stored before it is erupted onto the earths surface.
Magma chamber
A dark volcano rock that is made from the mantle and oceanic plate material. these rocks are typically associated with shield and fissure vent volcano.
Baslalt
The semi-solid, think, very hot layer beneath the crust.
Mantle
A steep-sided, often cone shaped volcanic peak, formed by layers of ash, relatively sticky lava and other eruption products.
Stratovolcano
Large volcanic crater formed by the collapse of the volcanic summit as the result or major explosion.
Caldera
To change a solid material into a liquid by adding thermal energy.
Melting
Thin crust beneath earths big oceans
ocean basin
An area on earths surface close to high thermal energy flow and/or the line of volcanic and earthquake activity
region of change.
A volcanic vent or a chain of vents through which lava and gases erupt, usually without a explosive activity.
fissure vent
To change a liquid material into solid by removing or releasing thermal energy
crystallization
Energy from the mantle moving towards the crust and changing the physical properties of earths material (melting) and escaping on the earths surface (crystallization)
Flow of energy
An area on earths surface with little evidence of thermal energy flow and far away from the line of volcanic and earthquake actitvity.
region of stability