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Science Final Hacker

Science Finalll

Weather short term state of the atmosphere including temperature, humidity, precipitation, wind and visibility
Humidity amount of water vapor in the air
Relative Humidity ratio of the amount of water vapor in the air to the maxium amount of water vapor the air can hold at a set temperature
Condensation the cjange of state from a gas to a liquid
Cloud a collection of small water droplets or ice crystals suspended in the air which forms when air is cooled and condensation occurs
Precipitaion any form of water that falls to the earths surface from the clouds
Air Mass a large body of air where temperature and moisture content are constant throughout
Front boundary between air masses of different densities and usually sifferent temperatures
Cyclone an area in the atmosphere that has lower pressure than the surounding areas and has winds that spiral toward the center
Anticylcone The rotation of air around a high pressure center in the direction opposite to earths rotation
Thunderstorm A usually brief heavy storm that consists of rain strong winds lightning and thunder
Lighting An electronic discharge that takes place between two oppositly charged surfaces. such as between a cloud and the ground, between two clouds or two parts of the same cloud
Thunder The sound caused by the rapid expansion of air along an electric strike
tornado a destructive rotating column of air that has very high wind speeds is visible as a funnel shaped cloud and touches the ground
Hurricane A severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensly low-pressure storm center
Thermometer An instument that measures and indicates temperature
Barometer An instrument that measures atmosoheric pressure
Anemometer An insturment used to measure wind speed
Divergent boundary The boundary between two tectonic plates that are moving away from each other
Convergent boundary The boundary formed by the collision of two lithosphereic plates
Crust The thin and solid outermost layer of the earth above the mantle
Mantle The layer of rock between the earths vrust and core
Core The central part of the earth below the mantle
Lithosphere The solid outermost layer of the earth that consists of the crust and the rigid upper part of the mantle
Asthenosphere The soft layer of the mantle on which the tectoinc plate move
Mesosphere The strong lower part of the mantle between the asthenosphere and the outer core
Tectonic plates A block of lithosphere that consists of the crust and the rigid outermost part of the mantle
Continental drift The hypothesis that states that the continents once formed a single landmass broke up, and drifted to their present locations
Sea- Floor spreading The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies
Plate tectonics The theory that explains how large pieces of the earths outermost layer called tectonic plates move and change shape
Transform Boundary The boundary between tectonic plates that are sliding past each other horizantly
Compression Stress that occurs when forces act to squeeze an object
Tension Stress that occurs when forces act to strech and object
Folding Th bending of rock layers due to stress
Fault A break in a body of rock along which one block sides relative to another
uplift the rising of the earths crust to higher elevations
Subsidence The sinking of regions of the earths crust to lower elevations
Seismology The study of earthquakes
Deformation The bending, tilting, and breaking of earths crust the change in shaoe of rock in response to stress
Elastic rebound The sudden return of elastically deformed rock to its undeformed ock
Seismic wave A wave of energy that travels through the earth away form an earthquake in all directions
P wave A seismic wave that causes particles of rock to move in a back and forth direction
S wave A seismic wave that causes particles of rock to move in a side to side direction
Seismograph An instrument that records vibrations in the ground and determines the location and strength of an earthquake
Seismogram a tracing of earthquake motion that is created by seismograph
Epicenter The point on earths surface directly above and earthquakes starting point or focus
Focus The point along a fault at which the first motion of an earthquake occurs
Gap hypothesis A hypothesis that is based on the idea that a major earthquake is more likely to occur along the part of an active fault where no earthquakes have occured for a certain period of time
Seismic gap An area along a fault where relativly few earthquakes have occurred recently but where strong earthquake have occurred in the past
Volcano A vent or fissure in the earths surface through whch magma and gases are expelled
magma chamber the body of molten rock that feeds a volcano
Vent An opening at the surface of earht through which volcanic material passes
Crater A funnel shaped pit near the top of the central vent of a volcano
Caldera A large semicirlular depression that forms when the magma chamber below a volcano partially empties and cause the ground below to sink
Lava Plateau A wide flat landform that results from repeated nonexplosive eruptions of lava that spread over a large area
Rift zone An area of deep cracks that forms between two tectonic plates that are pulling away from each other
hot spot A volcanicly active area of earths surface far from a tectonic plate boundary
Created by: spammaid