weather map, also known as synoptic weather chart, displays various meteorological features across a particular area at a particular point in time and has various symbols which all have specific meanings.[1] Such maps have been in use since the mid-19th century and are used for research and weather forecasting purposes. Maps using isotherms show temperature gradients,[2] which can help locate weather fronts. Isotach maps, analyzing lines of equal wind speed,[3] on a constant pressure surface of 300 or 250 hPa show where the jet stream is located. Use of constant pressure charts at the 700 and 500 hPa level can indicate tropical cyclone motion. Two-dimensional streamlines based on wind speeds at various levels show areas of convergence and divergence in the wind field, which are helpful in determining the location of features within the wind pattern. A popular type of surface weather map is the surface weather analysis, which plots isobars to depict areas of high pressure and low pressure. Cloud codes are translated into symbols and plotted on these maps along with other meteorological data that are included in synoptic reports sent by professionally trained observers.
Synoptic means "view together" or "view at a common point". A synoptic weather map shows weather patterns over a large area by putting together many weather reports from different locations all taken at the same moment in time.
<span>The right answer is B - American agriculture is best suited to the use of large plowing and harvesting equipment. American harvesting is so called because it was a system devised by the settlers in America that allowed them to provide large amount of food, making the most of the seemingly unlimited space that they now had access to.</span>
