(a nǝ līz): To study or find out the nature and relationship of the parts of something.

(krī tir ē ə): (singular: criterion) A standard on which a judgment or decision may be based.

(ē kō sis tǝm): A system made up of an ecological community of living things interacting with their environment especially under natural conditions.

(mä dǝl): (noun): (1) Type or kind; (2) a system of postulates, data, and inferences presented as a mathematical description of an entity or state of affairs.

(verb): To make a simplified copy or representation of something to help aid understanding.

(ver ē ə bəl): (1) A factor, trait, or condition that can be changed or controlled; (2) a quantity that may assume any one of a set of values.