Final answer:
The mass of 1,000 cm3 of water is indeed one kilogram, consistent with the metric system's definition of the kilogram based on the properties of water.
Step-by-step explanation:
The statement that the mass of 1,000 cm3 of water is one kilogram is true. Water was used as the reference for defining the units of mass in the metric system. By definition, the density of water is 1 g/cm3, which is also equivalent to 1,000 kg/m3. Since 1,000 cm3 is equal to 1 liter and the density of water is 1 g/cm3, the mass of 1 liter or 1,000 cm3 of water is 1,000 grams, which equals one kilogram.