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Since this one has more marbles for each box part (4) than the first one (3), we can say that the second one is DENSER. Salinity adds to mass (no. of marbles) but not to the volume (size of box). Thus, the more salinity, the denser. Temperature may also affect water density. When the temperature is high, molecules in water disperse and move around more rapidy than they usually do in order to spread the heat energy.
density of the solution to the density of water. Density is defined as the amount of mass per unit volume. For liquids, density is measured in grams per cubic milliliter (g/mL3). Because of the expansion and contraction of liquids, density varies with temperature. At 20 degrees C,