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21 Cards in this Set
- Front
- Back
What is standard temperature and pressure? |
29.92 Hg’s at 15’C (59’F). This is the standard atmosphere. |
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Name and describce the 5 types of altitude. |
1. True Altitude - The actual height above mean sea level (MSL). |
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What is pressure gradient force? |
Pressure Gradient Force- The air traveling from a higher pressure system to lower pressure system, flows directly across the isobars. |
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What is Coriolis force? |
Coriolis Force- Due to the rotation of the Earth, air is deflected 90 degrees as it moves. |
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What behavior develops as a reaction between pressure gradient and Coriolis force? |
Between pressure gradient and coriolis forces, the air is forced to move parallel to the isobars. |
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What is friction force? |
Friction force- Closer to the surface, air is forced to move at an angle toward the lower pressure. Friction from the surface decreases the speed, hence, the effect of coriolis. |
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What is katabatic wind? |
Any form of wind moving down a slope. |
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Describe the effect on wind produced by mountains and valleys. |
Mountain and Valley winds- |
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Describe land and sea breeze. |
Land and Sea breeze - Because land changes temperature more easily then water. |
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What is instability and what are the characteristics of stable and unstable air? |
Stability in the atmosphere is resistance to the vertical movement of air. Instability is caused by the warming from below. |
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When will fog form? |
When the difference between the temperature and the dew point are with in about 5 degrees, fog will generally form. |
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Name and describe the 4 types of fog. |
Radiation Fog - Low laying flat areas on calm, cool, humid nights. |
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Name the 4 base altitudes of each corresponding cloud. |
a. Low- Stratus-SFC to 6,500’ |
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What are the four cloud types? |
Stratus - Layer (sheet like) |
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What is air mass modification and what are 4 occurrences? |
Air Mass Modification- As an air mass passes over another geographical region it may be modified. |
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What is a front? |
A front is a zone between two or more air masses |
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Name and describe the 4 types of fronts. |
1. Warm Front - Warmer air replacing a cooler air mass. |
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What are the 3 things required for a thunderstorm? |
1. High Humidity |
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Describe a thunderstorm's life cycle. |
1. Cumulus Stage - Hard updrafts, and rapidly building towering cumulus clouds. |
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How far away should you fly from a thunderstorm? |
Always avoid thunderstorms by at least 20 NM |
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What conditions are always associated with thunderstorms? |
IFR, Turbulence, and lightning are always associated with thunderstorms |