force and energy

Introduces different types of forces, the laws that govern them, and Einstein's theory of relativity.

Explains the science of forces and motion, discussing gravity, frictional forces, the laws of motion, and other topics.

Introduces the properties of energy and includes related, hands-on activities.

Explores properties of forces such as friction and gravity, through experiments using equipment that is readily available both in homes and schools.

Text accompanied by photographic illustrations survey various sources of energy and the ways in which they have been harnessed.

Provides more than fifty experiments illustrating the properties of force and motion including gravity, inertia, and density.

Illustrates words that describe actions and introduces words that relate to forces.

Examines the ways in which forces are produced and the effects they have on the objects around them.

An introduction to biology, focusing on energy and matter, with introductions to notable discoveries and scientists in the field, feature boxes, and illustrations.

Explores some of the science of baseball, examining questions such as whether curve balls really curve, how knuckle balls and spitballs move, and how pitching a ball with backspin or overspin affects the batted ball.