1 2 3 4 1 _ _ _ _ 2 _ _ _ _ 3 _ _ _ _ 4 _ _ _ _ ACROSS 1) a diagrammatic representation of the earth's surface (or part of it) 2) the chief ____utive department of the united states government 3) primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves 4) a structure in which animals lay eggs or give birth to their young DOWN 1) an average of n numbers computed by adding some function of the numbers and dividing by some function of n 2) a shaft on which a wheel rotates 3) a wooden pin pushed or driven into a surface 4) singing jazz; the singer substitutes nonsense syllables for the words of the song and tries to sound like a musical instrument ** Scroll down for solution. ** Are you sure you want to peek? maps exec alga nest