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midterm part 2
N/A
22
Science
6th Grade
01/27/2011

Additional Science Flashcards

 


 

Cards

Term
Thunderstorm
Definition
a disturbing in the atmosphere that can have lightening, thunder, gusty winds, heavy rain and hail.
They occur during spring and summer during the warmest part of the day.
Term
Tornado
Definition
a rotating column of air that forms from thunderstorms over dry land
You measure there intestine with the (f)ujita scale.
Narrow storm-can range from a few meters up to a mile wide.
Most of them occur from july to march in the us during late afternoon
A waterspout is a tornado that occurs over water.
Term
Hurricanes
Definition
A massive rotating storm that can be up to 300 miles wide.
Begins as a tropical storm.
Occur over warm waterspout
Wind speed determine the category on the saffir/simpson scale.
North atlantic and east pacific is called a Hurricane.
Indian ocean and Australia is called a cyclone
Western pacific is called a typhoon
Term
Vortex
Definition
a spiral movement of air or liquid
In a hurricane, the eye is an example of the center of the vortex
3 causes that form vortexes is, uneven heating of Earths surface, forces of gravity, and Earths rotation.
Term
What is an Air Mass
Definition
When air moves over surfaces it takes on the temperature and humidity conditions-creating air mass.
Term
What is symbol and what does a cold front and warm front stand for.
Definition
Cold Front- Blue triangles. Cold temperatures and stormy.
Warm Front= Red half circles. Warm temperature nice and sunny.
Term
What are the four main layers of the atmosphere classified by?
Definition
They are classified by change in temperature.
Term
Troposphere
Definition
inner and lowest layer, Earths weather occurs here.
Term
Stratosphere
Definition
this layer absorbs ultraviolet radiation, contains ozone layer.
Term
Mesosphere
Definition
most meteoroids burn up in this layer
Term
Thermosphere
Definition
outer most layer, no definite outer limit and is the hottest layer.
Term
Lower and upper parts of the thermosphere.
Definition
Ionosphere- reflects radio waves back to EARTH, aurora borealis ( northern lights occur here. This is lower
Exosphere- phone calls and television pictures often reach you by way of communication satellites that orbit Earth. Upper layer
Term
Radiation
Definition
the direct transfer of energy by electromagnetic waves. (example, heat from the sun)
Term
Conduction
Definition
the direct transfer of heat from one substance from another it is touching. (example, sand on your feet.
Term
Convection
Definition
The transfer of heat by the movement of a fluid. (liquids and gasses) (example, rising hot air.)
Term
What is a convection current.
Definition
The rising of hot air and falling of cool air. -molecules less dense cool.
Term
Land breeze
Definition
cool land air moves to water during nighttime starting over land.
Term
Sea breeze
Definition
cool air from the water moves to land during daytime starting over water.
Term
Wind
Definition
air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure
The different rates that land and water change temperature causes wind.
Term
Monsoons
Definition
A powerful land and see breeze.
They change direction with the seasons.
Mostly happen in India
Periods of rain summer and land.
Heats up and pulls moisture from Indian ocean.
Term
Global winds
Definition
winds that continually form between the equator and the poles. Trade winds-flow toward equator
Westerlies- blow west to east
Easterlies- blow east to west
Caused by giant convection currents
Warm air at the equator rises and flows towards the poles-cold poler air sinks.
Term
Jet streams
Definition
Long narrow tubes of air in the upper troposphere. Few hundred kilometers wide
Can go ½ way around the Earth.
Winds-260 mph
moves weather in the us west to east.
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