What are (at least) six common pollutants that are measured to determine an AQI score? SOMEONE PLS HELP ME IVE BEEN WAITING FOR 3 DAYS FOR AN ANSWER THIS IS THE ONLY THING HOLDING ME BACK FROM SUBMITTING MY MOM IS GONNA KILL ME PLS THIS IS MY SECOND TIME ASKING PLS HELP ME

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

b. examine and describe cells