Vocabulary for Classifying

to observe: to see

related characteristics: qualities or features that are similar

mammals: a class of animals that includes humans

phrase: a group of words

to specify: to say clearly

component: part

processing: a set of chnages or functions (like step 1, step 2, etc.)

auxillary: helping, additional

operations: functions

substance: mass in the form of solid, liquid or gas

electrons: negative atomic particles

protons: positive atomic particles