Po 1.
You are given a solution from your instructor and asked to determine if it is an acid, base, or salt solution. You run two tests on the substance and in the duration of the tests you observe that it reacted
with certain metals to produce hydrogen gas, and it reacted with metal hydroxides to produce water and salt. Based on these observations you determine that the solution is an

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:

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.