Paper chromatography is a process used to separate mixtures of substances into their components. The components are carried by a mobile phase through a stationary phase made of absorbent paper. An investigation analyzed a sample of black ink to determine its components.Which property allows the components to separate?
A: the solubility of the components in the mobile phase

Students researched monkeys at a zoo. They recorded the monkeys' traits and behaviors. This investigation activity is best described as
A: observing.

Which form of energy are x rays and ultraviolet light?
A: electromagnetic

A student recorded the amount of rain that fell in one year in his city. What is the best way for him to organize his information?
A:
graph