In Wheels on a Bike, young readers are introduced to the scientific concept of rotational motion. Physics defines any object moving around a center point as using rotational motion. The wheels of a bike moving in a straight line use linear motion and, as they turn, the wheels also use rotational motion.
 
Softcover, 8×8 in., 24 pages
Word Count 188,  Lexile Measure 480L
A pronunciation guide is included. Reading Level 1-3, Interest Level 2-5.