Question: 1 gram is 1 cm3?
Answer: One cubic centimetre corresponds to a volume of 1 / 1,000,000 of a cubic metre, or 1 / 1,000 of a litre, or one millilitre (1 cm3 ≡ 1 ml). The mass of one cubic centimetre of water at 3.98 °C (the temperature at which it attains its maximum density) is closely equal to one gram.