Vocab 1
Any place where gas, ash, or melted rock comes out of the ground.
Volcano
Melted rock, less dense than solid rock so it rises up to the service
Magma
The three types of plate boundaries
Divergent, convergent, transform
The thinnest layer of the earth
Crust
The subduction zones that occur around the pacific ocean
Ring of Fire
A Volcano in which an eruption has not occurred in a long period of time.
Dormant Volcano
Magma that has reached the service of the Earth
Lava
The type of boundary occurs when two plates are moving away from one another
Divergent
Earth’s Physical Layers
Lithosphere
Asthenosphere
Mesosphere
Outer Core
Inner Core
Warning signs of a volcanic eruption
Earthquakes
Changes in the tilt of the ground
rising temperatures of openings
changes in volcanic gases being tested
the resistance of liquid material, such as lava, to flow.
Viscosity
Hot ash and bits of rock.
Pyroclastic materials
The type of plate boundary that has two plates moving parallel to one another in opposite directions
Transform
A layer of weak or soft mantle that is made of rock that flows slowly. Tectonic plates move on top of this layer
Asthenosphere
A volcano that has collapsed in on itself
Caldera
Volcano’s with alternating layers of hardened lava flows and pyroclastic material. These volcanoes are generally large and steep volcano mountains.
Composite Volcano
Volcanoes with a broad base and gently sloping sides. They cover a wide area and generally form from mild eruptions. Layers of lava flow out from the vent, harden, and slowly build up to form the cone. Example - Hawaiian Islands
Shield Volcanoes
The type of plate boundary that has two plates moving towards one another
Convergent
The strong, lower part of the mantle
Mesosphere
Quiet eruptions typically result in this magma type
Balastic
A location where a column of extremely hot mantle rock, called a mantle plume, rises through the asthenosphere. As the hot rock reaches the base of the lithosphere, it melts partially to form magma that can rise to the surface and form a volcano.
Hot Spots
Volcanoes with alternating layers of hardened lava flows and pyroclastic material. These volcanoes are generally large and steep volcano mountains.
Composite Volcano
Subduction
The movement of matter that results from differences in density is caused by variations in temperature. In the mantle, this takes place when cooler rock sinks and warmer rocks rise.
Convection
a fast-moving mixture of water, gases, and ash
pyroclastic flow