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.
Old High German spellon to tell, Old Norse spjalla, Gothic spillon to talk, tell), from PIE *spel- to say aloud, recite.. Related: Spelled; spelling. Meaning write or say the letters of a word is c.1400, from notion of read letter by letter, read with difficulty (c.1300).