Match the following. 1. Picard and Walsh bathyscaph Trieste 2. Forbes and Maury satellite-mounted sensors 3. developed in 1922 fetch 4. locates survivors at sea echo sounder 5. averages 30 miles wide "Father of Oceanography" 6. distance of open water over which wind flows continental shelf 7. rescued at 5,000-foot depth Alvin 8. query buoy-mounted systems sofar

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.