How fast is 75 miles per hour? How heavy are 4 tons? Units of measure are abstract until, that is, they are contrasted with other quantities. The entertaining juxtapositions in How Big Is
Big? How Far Is Far? make dimensions and measurements more comprehensible for children. The book features amusing comparisons that make US units of length, distance, weight, speed, volume, and
time easier to grasp. The Queen of England s crown, for example, weighs more than 100 portions of cotton candy. It would take eight days of travel in an elevator through the Earth s center to
reach the other end. When the world s oldest living tortoise was born, there were no electric lights, telephones, cars, or airplanes.
