What is the more common term for a quantitative
observation?

Measurement

Explanation:

Scientific research require observation and there are two types of observations, quantitative and qualitative observation

Collecting quantifiable data that is possible to be expressed in a number format is said to be a quantitative observation

Quantitative observation can also be described as observations that are defined by both words and numbers and they are therefore more useful than qualitative observations that involve only words

Quantitative observations involve expressions of variables that are quantifiable, that is material hat can be expressed in numbers.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.