Q: Is a gram now defined as one one-thousandth of the SI base unit? ¶
A: Yes, and the kilogram, or 1×10−3 kg, which itself is now defined, not in terms of grams, but as being equal to the mass of a physical prototype of a specific alloy kept locked up and preserved by the International Bureau of Weights and Measures.
Q: Was a gram the fundamental unit of mass in the 19th-century centimetre–gram–second system of units? ¶
A: Yes, The CGS system co-existed with the MKS system of units, first proposed in 1901, during much of the 20th century, but the gram has been displaced by the kilogram as the fundamental unit for mass when the MKS system was chosen for the SI base units in 1960.
Q: Is a gram today the most widely used unit of measurement for non-liquid ingredients in cooking and grocery shopping worldwide? ¶
Q: Is a gram roughly equal to 1 small paper clip or pen cap? ¶