Colorado QMAP Practice Exam

The response identifies that a liter is not equivalent to milligrams. This is accurate, as milligrams (mg) are a measure of weight, while liters (L) are a measure of volume. The two units are part of different measurement systems and cannot be directly compared without considering the density of the substance being measured. For example, if you have water, 1 liter weighs approximately 1000 grams, but this direct conversion does not apply universally to all substances because different materials have different densities.

In contrast, a cubic centimeter is equivalent to a milliliter, which again relates to volume but can be converted to milligrams for substances with known densities. A gram is 1000 milligrams; therefore, it is directly related to milligrams in a straightforward conversion relation. A milligram is, of course, a direct representation of a milligram. This understanding of the differences between weight and volume measurements reinforces why the liter is not interchangeable with milligrams.