power (mechanics)

Questions and answers explore the definition, causes, effects, and uses of energy.

Instructions for a variety of projects and experiments related to solar, thermal, electrical, kinetic, and potential energy.

Describes how windmills work, their different types, where they can be found, and how they are used as alternate sources of electricity.

Introduces the science behind forces and machines, with examples such as the use of gravity, friction, levers, and pulleys to make machines work. Includes simple experiments.

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

Discusses the phenomena of force, movement, pressure, and friction, the mechanics involved in moving things, and the means by which machines work.

Text and illustrations explain the principles and uses of electricity.

Discusses the speed and power of several land, sea, and air vehicles in a question and answer format.

A scientific introduction to energy, explaining how it works, introducing important people and events in the history of energy, and including experiments.

Presents an introduction to the basic scientific concept of forces, in simple text with illustrations, including experiments and projects to help enhance understanding.