the relatively thick part of the earth's crust that forms the large landmasses. It is generally older and more complex than the oceanic crust.
What is CONTINENTAL CRUST
100
a broad, domed volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava.
What is SHIELD VOLCANO
100
Earthquake Risk. Main Content. Seismic hazards and risks and how they are measured;
What is EARTHQUAKE RISK
100
An earthquake wave in which rock particles vibrate at right angles to the direction of wave travel. It can travel through solids but not through liquids.
What is SECONDARY WAVE-
100
a large volcanic crater, typically one formed by a major eruption leading to the collapse of the mouth of the volcano.
What is CALDERA
200
a dense, destructive mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and typically flowing downslope at great speed.
What is PYROCLASTIC FLOW
200
a small area or region with a relatively hot temperature in comparison to its surroundings.
What is HOT SPOT-
200
hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.
What is LAVA
200
a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.
What is WATER
200
A type of seismic body wave in which rock particles vibrate parallel to the direction of wave travel. Primary waves are alternatingly compressional and extensional, and cause the rocks they pass through to change in volume
What is PRIMARY WAVE-
300
the state of being thick, sticky, and semifluid in consistency, due to internal friction.
What is VISCOSITY
300
Most composite volcanoes have a crater at the summit which contains a central vent or a clustered group of vents.
What is COMPOSITE VOLCANO-
300
Volcanic ash consists of fragments of pulverized rock, minerals and volcanic glass, created during volcanic eruptions
What is VOLCANIC ASH-
300
a numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations.
What is RICHTER SCALE
300
become or cause to become incorporated into a liquid so as to form a solution
What is DISSOLVED
400
Cinder cones are commonly found on the flanks of shield volcanoes, stratovolcanoes, and calderas.
What is CINDER CONE VOLCANO-
400
a twelve-point scale for expressing the local intensity of an earthquake
What is MERCALLI SCALE
400
a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust
What is VOLCANO-
400
hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed by cooling.
What is MAGMA
400
tending to be different or develop in different directions
What is DIVERGENT
500
a hard, unreactive, colorless compound that occurs as the mineral quartz and as a principal constituent of sandstone and other rocks.
What is SILICA
500
the center of interest or activity
What is FOCUS
500
an air like fluid substance which expands freely to fill any space available, irrespective of its quantity
What is GASES
500
the relatively thick part of the earth's crust that forms the large landmasses. It is generally older and more complex than the oceanic crust.
What is CONTINENTAL CRUST
500
coming closer together, esp. in characteristics or ideas