Shared Flashcard Set

Details

The Chase: On The Run in Tornado Alley
Mission 3
32
Science
6th Grade
02/04/2012

Additional Science Flashcards

 


 

Cards

Term
Thunderstorm
Definition
forms as warm, moist air rises
Term
kinetic energy
Definition
the energy processed by a moving body of matter as a result of its motion
Term
latent heat energy
Definition
most of this type fuels thunderstorm formation.
heat released or absorbed by a substance during a phase change.
Term
dew point
Definition
temperature at which water vapor condenses into water.
Term
lightening
Definition
usually occurs ahead of the region where tornadoes is most likely to form
Term
lightening takes different forms
Definition
1. surges between clouds: Never reaches the ground
2. surges between clouds and the ground
3. forms between clouds; rare. bright flash of lightening in the sky
Term
2. Between clouds and ground
Definition
Top of cloud is (+). Bottom is(-) the ground takes on a (+)charge.
unstable state overcomes insulating capacity of air. first stream of (-) charge races from cloud to ground. called stepladder, zigzag path. nears ground stream of (+) charges rises from ground. When both charges meet circuit closes. immediate massive stroke of electricity moves between cloud and ground.
Term
Thunder
Definition
Sudden and extreme change causes the air to expand violently. Sonic boom sounding.
Term
supercells
Definition
have a zone of strong rotation
Term
tornado
Definition
comes from super cell a violently spinning column extending from thunderstorm cloud to ground.
Term
funnel cloud forms
Definition
air pressure inside is very low. Air rushes toward tornado in all directions. air rises and water vapor condenses inside tornado, a funnel cloud forms.
Term
Fujita Scale or F-Scale
Definition
offers a way to compare tornadoes it is subjective. Levels determined by damage caused.
Term
EF-Scale
Definition
offers an enhanced means of rating and comparing tornadoes. Subject to human bias also.
Term
Tornado Alley
Definition
Great Plains of the United States.
Particularly favorable for the development of tornadoes.
Cooler, drier air from Rocky Mountains clash with the warmer, moist air from the Gulf of Mexico
Term
Dry Line
Definition
a boundary at which moist air meets dry air
Term
Questions yet to be answered
Definition
1.why do SOME thunderstorms produce Tornadoes and others do not
2. What is happening inside of the storm when Tornadoes forms
3.why do some tornadoes last for an hour or more and others last minutes.
Term
Tropical cyclone
Definition
massive tropical storms with extremely string winds spiral around center of low pressure
Term
Typhoons
Definition
a type of tropical cyclone formed in Western Pacific Ocean.
Term
Cyclone
Definition
a type of tropical cyclone formed in Indian and South Pacific Oceans
Term
Hurricane
Definition
A type of tropical cyclone formed in Atlantic and Eastern Pacific Oceans
Term
Coriolis Effect
Definition
The spiraling of winds produced by Earths rotation
Counterclockwise: Southern Hemisphere
Clockwise: Northern Hemisphere
Term
Eye
Definition
circular region located at the center of a hurricane. Usually has calm weather.
Lowest surface air pressure of storm
Term
Eyewall
Definition
region of tall clouds, heavy rain and strong winds surrounding a hurricanes eye. Normally most deadliest part
Term
Rainbands
Definition
regions of heavy thunderstorms beyond the eyewall
Term
Conditions necessary for a hurricane to form. All three must exist.
Definition
1. sea-surface temp must be more than 80*F
2. the exchange of heat energy from the ocean up into the atmosphere
3.light winds outside system that create convection but ar enot strong enough to topple the build up of the hurricanes tall clouds or tear apart rotational motion in the developing storm.
Term
Hurricane may weaken for these reasons
Definition
high wind shear; moving over cooler ocean water;having its moist, rising air stop or dried out; and moving over land
Term
Wind Shear
Definition
a change in wind speed and/ or direction in different heights in the atmosphere
Term
Saharan Air Layer
Definition
Hot dry dusty air layer that forms over North Africa during the summer and affects the formation of hurricanes in the Atlantic.
Term
Temperature Inversion
Definition
A condition of the atmosphere during which a layer of warmer, less dense air lies above a layer of cooler, denser air.
Term
Hurricane Season
Definition
June through November
Term
5 Stages of Hurricane formation
Definition
1.A tropical disturbance forms
2.Tropical disturbance becomes a tropical depression
3.tropical depression becomes a tropical storm
4.Hurricane forms
5. Landfall
Term
Dropsonde
Definition
an instrument package designed to be dropped from an aircraft by a parachute.
Takes a series of measurements as it falls. sensors measure wind speed, direction, temperature , humidity and air pressure. send info back to plane. Produces a vertical profile and 3-D models of event
Supporting users have an ad free experience!