Peter Pig and Polly Pig are in love, but her father has declared that they will not marry until pigs fly, and includes vocabulary words and discussion questions.
Two Moons, an eleven-year-old Navajo boy living in Utah in 1939 in the home of his schoolmate Matt, becomes best friends with Matt and helps him pursue his dream of flying.
Examines the natural forces of gravity and friction that are constantly at work on Earth. Demonstrates the principles and forces that govern moving objects and how we use them to our advantage. Part 1 presents the law of universal gravitation and the forces of static and kinetic friction. Part 2 introduces Sir Isaac Newton's three laws of motion and the principles and forces that govern moving objects. Part 3 examines some of the different ways time can be measured, including sidereal and solar time. This section also examines why Earth has days and nights. Part 4 investigates jet engines, wing design, and special building materials that allow airplanes to take to the skies.