AP PSYCHOLOGY

Detailed explanation-1: -Infinity goes on forever, so sometimes space, numbers, and other things are said to be ‘infinite’, because they never come to a stop. Infinity is not really an ordinary number, but it is sometimes used as one. Infinity often says how many there is of something, instead of how big something is.

Detailed explanation-2: -But one application of infinity is integral to many aspects of everyday human cognition, including language, music, and problem solving. It’s called recursion, and children begin to grasp it around age 9, according to a fascinating study published in the October issue of Cognition.

Detailed explanation-3: -Tell the child that each point on the line represents a number, where the numbers are arranged such that the larger numbers are on the right. Then tell them that infinity is the number (the point) that is the largest (the farthest to the right). If they’re smart, they’ll see that no such number (or point) exists.