This document discusses the concept of scale and provides examples using a model car. It states that scale can be expressed as a written statement, ratio, or using a scale line. A scale line shows that for every 1 unit on a map, it represents a larger unit of real distance - for example, 1cm on a map could equal 1km in real distance. The document encourages calculating the real dimensions of a car using a scale ratio if the model dimensions are given.