Question

part b true - false
classify each of these statements as always true, at; sometimes true, st; or never true.
nt 11. the si base unit of mass is the milliliter.
at 12. a decigram is 100 times smaller than a gram.
nt 13. the si unit of volume is derived from the unit of length.
nt 14. there are six basic si units of measurement.

Explanation:

Step1: Recall SI base - unit of mass

The SI base - unit of mass is the kilogram, not the milliliter (which is a unit of volume). So statement 11 is never true (NT).

Step2: Analyze the relationship between decigram and gram

1 decigram (dg) = 0.1 grams (g), so a decigram is 10 times smaller than a gram, not 100 times. So statement 12 is never true (NT).

Step3: Understand SI unit of volume

The SI unit of volume is the cubic - meter ($m^{3}$), which is derived from the unit of length (meter). So statement 13 is always true (AT).

Step4: Know the number of SI base units

There are seven basic SI units of measurement: kilogram (mass), meter (length), second (time), ampere (electric current), kelvin (temperature), mole (amount of substance), and candela (luminous intensity). So statement 14 is never true (NT).

Answer:

1. NT
2. NT
3. AT
4. NT