Contour Lines: Contour lines are used to determine elevations and are lines on a map that are produced from connecting points of equal elevation (elevation refers to height in feet, or meters, above sea level). profile may be constructed quickly and accurately across any straight line on a map by following this procedure: a. Lay a strip of paper along a line across the area where the profile is to be constructed. b. Mark on the paper the exact place where each contour, stream and hill top crosses the profile line.
During may you will find snow at the North and South pole. It will also snow in high lying areas such as some mountains. Many people forget that while in May that while the Northern Hemisphere is experiencing spring (which in some places means there is still snow), the Southern Hemisphere is experiencing winter.
Snowfall will be above normal in the east and below normal in the west, with the snowiest periods in late January and early to mid-February. April and May will be warmer than normal, with rainfall below normal in the east and above normal in the west. Summer will be cooler and slightly drier than normal, with the hottest periods in early and mid-July and mid-August. September and October will be rainier than normal, with near-normal temperatures.