# Shared Flashcard Set

Chapter Test
n/a
23
Science
8th Grade
02/26/2014

## Cards Return to Set Details

Term
 What is 'weather'?
Definition
 A condition of earth's atmosphere at a specific time and place.
Term
 What is the 'atmosphere'?
Definition
 An envelope of gases that surrounds the planet, and protects it from; extreme temperatures harmful rays from the sun
Term
 What  gases is the atmosphere made of, and what percent?
Definition
 1.) Gases such as; Nitrogen- 78% Oxygen -21% Carbon Dioxide- 0.03-0.04% Other gases-0.04% Argon- 0.93%
Term
 What liquids are in the atmosphere, and what are they?
Definition
 Water Vapor; Water in gas form Sulfuric Acid; Released from volcanic activity
Term
 What solids are in the atmosphere?
Definition
 Dust(More Common) Smoke Salt Chemicals Pollen
Term
 Why is our atmosphere considered a system? And what are the parts that make it a system?
Definition
 It's considered a system because it's made up of different parts that change.   Parts that make it a system are; Sun Temperature Gases/Air Percipitation Winds Clouds
Term
 Air has.....?
Definition
 Mass, Density, and Pressure
Term
 What is the formula for density?
Definition
 D= M/V
Term
 The more (1)____ in a given amount of air, the greater the (2)______ is.     Fill in the blanks!
Definition
 1.) molecules 2.) density   Complete sentence; The more molecules in a given amount of air, the greater the density is.
Term
 What is pressure?
Definition
 Pressure is; a force applied to one area
Term
 At sealevel...?
Definition
 The amount of air pressure per square inch is 14.7 pounds
Term
 What is a barometer?
Definition
 A device that measures air pressure
Term
 What does the prefix 'baro' mean?
Definition
 Weight
Term
 What is a mercury barometer?
Definition
 A mercury barometer is a long, glass tube that's closed at one end. As air pressure increases, the mercury levels rise.     *Measured in inches!!!!!!
Term
 What is an Aneroid barometer?
Definition
 An airtight metal chamber that's sensitive to the changes in air pressure.     *This is the more common barometer   *Aneroid: Without liquid
Term
 What are the parts of a weather report, and how are they measured?
Definition
 The parts are the forecasts, and the maps.   Forecasts; measured in mercury ex: 25.92 inches   Maps; millibars   *1 inch of mercury= 33.86 milibars     ex: 29 inches of mercury= 981.94 millibars
Term
 What is altitude?
Definition
 The height above sea level
Term
 The (1)____ you go, the (2)____ air pressure there is, because it spreads out more; there's less air the (same as 1)____ you go in the atmosphere.
Definition
 Higher Less Completed sentence; The higher you go, the less air pressure there is, because it spreads out more; there's less air the higher up you go in the atmosphere.
Term
 What is more dense; hot air, or cold air?
Definition
 Colder air is more dense. This means that there's a greater pressure, and so, warmer air spreads out. The end result it lower air pressure.
Term
 How does air move? *What kind of air goes to another kind of air?
Definition
 Areas of high pressure(cold air) want to go to areas of low pressure(warm air)
Term
 The four main layers of the atmoshpere....?
Definition
 are based on changes in temperature.
Term
 What are some important details about the troposhere? Be sure to include; What tropo means What layer of the atmosphere it is How dense is it? What percentage of gases are found here? What percentage of water vapor is found here? What's the temperature like?
Definition
 Tropo means turning or changing. This is the lowest layer Most dense 75% of all gases are in the troposhere 99% of all water vapor is in the troposhere For every 1 kilometer you go up, the temperature drops about 6.5 degrees celcius
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