Which of the following is an example of an experimental scientific investigation? a- placing test tubes in an ice bath for 15 minutes b- recording the sound of class breaking c- noting the ph of a solution on a digital meter d- noting the color of a solution when heated

A. PLACING TEST TUBES IN AN ICE BATH FOR 15 MINUTES

im not in connections yet but i might can you some questions. what grade are you in?

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.