Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Chapter 18 Test 5 material Begin AIR EXERTS A FORCE ON THE SURFACE OF OBJECTS THAT IT CONTACTS. AIR PRESSURE IS A MEASURE OF THAT FORCE PER UNIT OF SURFACE AREA WITH FEWER AIR MOLECULES IN THE UPPER ATMOSPHERE, THE PRESSURE DECREASES AS WE RISE IN THE ATMOSPHERE IT DECREASES AT AN INCREASING RATE MOUNTAIN SICKNESS DIZZY HEADACHE SHORTNESS OF BREATH RED BLOOD CELL COUNT NEEDS TO INCREASE THINK CUBS WILL WIN IT ALL AIR PRESSURE DIFFERS FROM ONE PLACE TO ANOTHER AND THESE MIGHT NOT BE FROM ELEVATION DIFFERENCES ALONE HUGE VOLUME OF AIR THAT IS RELATIVELY UNIFORM IN TEMPERATURE, DENSITY, AND WATER VAPOR CONTENT AS AIR MASS MOVES ACROSS THE EARTH’S SURFACE THE PRESSURE FALLS OR RISES BASED UPON QUALITY OF THE AIR MASS RISING PRESSURE = IMPROVING WEATHER FALLING PRESSURE = STORM Y WEATHER STEADY PRESSURE = WEATHER STAYS THE SAME COLD OR WARM AIR? DRY OR MOIST AIR? WHEN MOISTURE IS ADDED TO THE AIR, A HEAVIER GAS IS REPLACED BY THE WATER VAPOR SO MOIST AIR IS LIGHTER THAN DRY AIR DIVERGENCE OF AIR ANTICYCLONE CONVERGANCE OF AIR CYCLONE MILLIBARS = 1014 MB AT SEA LEVEL INCHES = 29.92 INCHES AT SEA LEVEL BAROMETER - MERCURY OR ANEROID ( LEGENDS ON THE DIAL) BAROGRAPH ALTIMETER ◦ Chapter 18 ◦ Test 5 Material PRESSURE GRADIENTS CORIOLIS EFFECT FRICTION CENTRIPETAL AND CENTRIFUGAL FORCE GRAVITY A GRADIENT IS SIMPLY A CHANGE IN SOME PROPERTY WITH DISTANCE. PRESSURE GRADIENT IS DIFFERENCE IN AIR PRESSURE FROM ONE PLACE TO ANOTHER. A GRADIENT IS SIMPLY A CHANGE IN SOME PROPERTY WITH DISTANCE. PRESSURE GRADIENT IS DIFFERENCE IN AIR PRESSURE FROM ONE PLACE TO ANOTHER. AN ISOBAR IS A LINE THAT CONNECTS POINTS OF EQUAL AIR PRESSURE. WHEN ISOBARS ARE CLOSELY SPACED, WE HAVE A STRONG PRESSURE GRADIENT AND HIGH WINDS. WHEN THE ISOBARS ARE FAR APART, THE GRADIENT IS WEAK AND WINDS ARE LIGHT. EARTH’S ROTATION IS RESPONSIBLE FOR THE CORIOLIS EFFECT WHICH IS A DEFLECTION OF THE WINDS. IN THE NORTHERN HEMISPHERE, WINDS ARE DEFLECTED TO THE RIGHT; IN THE SOUTHERN HEMISPHERE TO THE LEFT. AN INWARD PULLING FORCE AN OUTWARD PULLING FORCE CENTRIPETAL AND CENTRIFUGAL FORCE TOGETHER PRODUCE A CIRCULAR PATTERN OF WINDS AROUND HIGH AND LOW PRESSURE SYSTEMS