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.
Spir, or spiro, is Latin and is defined as to breathe, or is Greek and is defined as spiral. 1  An example of spir used as a prefix is in the word spirograph which means a chart regarding airflow. 2  An example of spir used as a prefix is in the word spirillum which means a bacteria with a twisted cell body.