Which scenario represent a scientific investigation a. a measurement of growth patterns of crystals space b. a selection favorite songs in a survey c. a questionnaire on the quality of care in the hospital d. survey on the best opinions for reducing air pollution

The correct answer is A. A measurement of growth patterns of crystals space

Explanation:

A scientific investigation is a type of investigation that uses the scientific method (observation, question, creating a hypothesis, testing, analyzing information, share results) to formulate explanation about the world or a certain phenomenon. Because of this, the scientific investigation is mainly used to study phenomena of the natural world or any other phenomenon that can be testable and that is based on facts and reality rather than on perception or opinions. Considering this, the scenario that represents a scientific investigation is "A measurement of growth patterns of crystals space" because this focuses on a phenomenon of reality that can be testable, while others just focus on opinion or personal perspectives that cannot be tested.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.