Filtration, decantation, and evaporation are examples of ways in which scientists distinguish between elements and compounds separation by chemical means separation by physical means ways in which scientists separate compounds

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:

all eukaryotic cell have mitochondria : )