Science is orderly knowledge proven by

Science is orderly knowledge proven by observation and experimentation of certain phenomena.

Explanation:

Science is an ordered system of structured knowledge that studies, researches and interprets natural, social and artificial phenomena. Scientific knowledge is obtained through observation and experimentation in specific areas. This knowledge is organized and classified on the basis of explanatory principles, whether theoretical or practical. From these, questions and reasoning are generated, hypotheses are formulated, scientific principles and laws are deduced, and scientific models, scientific theories and knowledge systems are constructed by means of a scientific method.  

Science considers and is based on experimental observation. This type of observation is organized through methods, models and theories in order to generate new knowledge. For this, truth criteria and a research method are previously established. The application of these methods and knowledge leads to the generation of new knowledge in the form of concrete, quantitative and verifiable predictions referring to past, present and future observations.

6/12=1/2

step-by-step explanation:

a and b sometimes have a positive value