Use Figure 14.12, showing generalized pressure variations with altitude, to answ

Question

Use Figure 14.12, showing generalized pressure variations with altitude, to answer questions 56 and 57. Atmospheric pressure (increases, decreases) with an increase in altitude because there is (more, less) atmosphere above to exert a force. Circle your answers. Pressure changes, with altitude (most, least) rapidly near Earth's surface. Since surface elevations vary, barometric readings are adjusted to indicate what the pressure would be if the barometer was located at sea level. This provides a common standard for mapping pressure, regardless of elevation. A city that is 200 meters above sea level would (add, subtract) units to its barometric reading in order to correct its pressure to sea level. Observe the average global surface pressure maps with associated winds for January and July in Figure 14.13. The lines shown are isobars, which connect points of equal barometric pressure, adjusted to sea level. Isobars can be used to identify the principal pressure zones on Earth, which include the equatorial lows, subtropical highs, and subpolar lows Answer questions 59-65 using Figure 14.13. The units used on the maps to indicate pressure are (inches of mercury, millibars). Circle your answer. By writing the word "HIGH" or "LOW, " indicate on the maps the general pressure at each of the following latitudes: 60 degree N, 30 degree N, 0 degree, 30 degree S, 60 degree S. Write on the maps the names (equatorial low, subtropical high, or subpolar low) of each of the pressure zones you identified in question 60. During the summer months, January in the Southern Hemisphere and July in the Northern Hemisphere, (high, low) pressure is more common over land. Circle your answer. (High, Low) pressure is most associated with the land in the winter months. Considering what you know about the unequal heating of land and water and the influence of air temperature on pressure, why does the pressure over continents change with the seasons? Why does the air over the oceans maintain a more uniform pressure throughout the year?

Explanation / Answer

56) Atmospheric pressure decreases with an increase in altitiude because there is less atmosphere above to exert a force.

Note: As the altitude increases , the amount of air decreases.So there will be less air to exert pressure on the atmosphere.

57) Pressure changes with altitude most rapidly near earth’s surface.

Note:  Pressure changes with altitude most rapidly near earth’s surface and slowly as we go up.

58) we will add units

Generally 1 mb is added for every 10 meters.

59) Millibars

The units used on weather maps to indicate atmospheric pressure are millibars(mb)

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