Water has a density of 1000 kg/m3 by standard definition at its temperature of maximum density 3.98 Â°C and at 0% salinity. Scientists and engineers use water as a baseline for comparing the relative density of various materials. Water with a density of 1000 kg/m3 at 3.98 Â°C has a mass of 1000kg and a volume of 1 m3.
Spelt is a word. It is the past participle of spell. It is also a type of wheat, and therefore also a noun. It depends upon whether you are using British English (and Spelt is correct) or you are using American English.
They are both correct. Spelt is the British English version whereas Spelled is the American English version. Since I am Irish I, of course, learned to say and write spelt in school. But since joining Yahoo Answers I have received some rude and ignorant comments regarding my usage of spelt instead of spelled.