All of the following are possible source of error in a scientific investigation except for? a)discovering new variables as the experiment proceeds b)not controlling all the variables in a experiment c)adding research resources during an investigation d)measuring the materials of an experiment incorrectly

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature