WEAX WX 301 Exam 1 Actual Questions and Answers 100% Correct; Embry-Riddle Aeronautical University

WEAX WX 301 Exam 1 Actual Questions and Answers 100% Correct; Embry-Riddle Aeronautical University If air is heated in a closed container what happens to the pressureq - ANSWER It will rise Pressure decreases with height faster in a ____ column - ANSWER Cold Where is high and low pressure in a warm column of air - ANSWER High pressure aloft and low pressure at the surface When flying towards an area that is warmer than normal, what will my altimeter read - ANSWER Low What happens to a parcel of air that's moved in a stable atmosphere? - ANSWER When the parcel is pushed up, it will be cooler than it's surroundings and sink back to the original level In the tropics, the stratosphere is what compared to mid latitudes - ANSWER Colder Where is the tropopause in the arctic? - ANSWER Lower and warmer Where are the strongest winds found? - ANSWER Tropopause Where is the tropopause the highest? - ANSWER The tropics Where is the tropopause coldest? - ANSWER The tropics At 40 latitude, when is the stratosphere coldest? - ANSWER Summer If the 3,000' wind in the NH is 090/30 what is the surface wind - ANSWER 040 at 18 When are the highs over the ocean strongest? - ANSWER The summer Prevailing surface winds in Lima, Peru are from the - ANSWER South Where is likely landing wind from in Asia in the winter v summer - ANSWER Winter - NE, Summer - SW Average winds at 35,000' above New Zealand are from - ANSWER The west When is the horizontal pressure gradient largest? - ANSWER When the isobars are spaced closely together What direction is the CF deflected in the SH - ANSWER To the left For a geostrophic wind at 090, where is the CF - ANSWER to the north In the Southern Hemisphere, airflow from the south means low pressure is to the - ANSWER east When the 500mb height is higher than normal, what happens to the pressure at 18,000 feet - ANSWER It's higher What do the contours on a 500mb chart mean - ANSWER Height in meters For the same isobar spacing, what latitude causes faster wind - ANSWER Lower latitudes How does air move around a cyclone due to friction - ANSWER Produces convergence and rising motion Is the troposphere warmest under a ridge or trough - ANSWER Ridge At 30,000 feet what kind of pressure is above the poles v tropics - ANSWER Low at poles, high at tropics (circulation cells) Where is the 300mb high pressure belt found in July - ANSWER 20N What month (season) has the lowest heights above the north pole - ANSWER January (winter) In winter, the northern hemisphere upper-level westerlies are __ and extend further __ than in summer - ANSWER stronger, south Weather is a factor in what percent of aviation accidents? - ANSWER 21% Weather is a factor in what percent of aviation fatalities? - ANSWER 30% What is the main cause of weather related aviation fatalities - ANSWER Continued flight into IMC What is the leading cause of airport wx delays - ANSWER Thunderstorms 500 mb is equal to __ Pa - ANSWER 50,000 What does not happen when a column of air is heated? - ANSWER Pressure decreases with height at a faster rate Cooling air at constant pressure will... - ANSWER Increase density What happens to a parcel that's less dense than it's surroundings - ANSWER The parcel will rise The Ferrel cell of the general circulation has rising air near latitude __ and __ sinking air near latitude __ - ANSWER 60, warmer, 30 The Hadley cell - - ANSWER has easterlies near the surface and westerlies aloft The heated Asian land mass in July has __ than normal pressure at the surface and __ than normal pressure aloft - ANSWER lower, higher In what season is the ITCZ furthest north - ANSWER Summer The most likely surface flow over India is from the ___ in July and from the ___ in January - ANSWER southwest, northeast During a sea breeze, where does the air flow and where is the surface low found - ANSWER Flows from sea to land, low pressure over land Where and when do lake-effect snows happen - ANSWER Nov-Jan, cP airmass What shores do lake-effect snows impact - ANSWER Eastern and southern Air flow from the north over ocean in the southern hemisphere is what kind of airmass - ANSWER mT In the cold air behind a cold front over the ocean, we typically find a ___ airmass and ___ weather - ANSWER mP, showery A mP airmass moving from the NE onto the northeastern U.S. is most likely - ANSWER cool, foggy, stable Name two source regions for an mT air mass - ANSWER Gulf of Mexico, tropical Pacific The northwest flow behind a cold front over Texas is most likely ___ with ___ weather. - ANSWER cP, clear and cold What are the most likely surface conditions to the north of a warm front - ANSWER Easterly flow, cold, drizzle Behind (west of) a cold front over Indiana, the air mass is __ and the weather is typically__ - ANSWER cP, clear and cold