Answer:
1. 3
2.A contour line is a line drawn on a topographic map to indicate ground elevation or depression. A contour interval is the vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line.
3.There are 3 kinds of contour lines you'll see on a map: intermediate, index, and supplementary.Index lines are the thickest contour lines and are usually labeled with a number at one point along the line.Intermediate lines are the thinner, more common, lines between the index lines.
4.The legend is located in the lower left margin. It illustrates and identifies the topographic symbols used to depict some of the more prominent features on the map. The symbols are not always the same on every map. Always refer to the legend to avoid errors when reading a map.
5.Five Basic Colors on a Military Map.
Explanation:
Just read my answers.
Paper burned and turned into smoke !
The answer is Scale Degree
Definition of Scale Degree - A name or number assigned to each pitch in a scale
You could google this, but the ratio between frequencies of one octave to the next is 2:1