Explains essential facts about light and dark, including natural and artificial light, color, and reflection. Includes experiments.

This text provides ideal revision opportunit ies with the inclusion of comprehensive questions at the end of each section, along with answers to encourage self-asses sment. '

This comprehensive encyclopedia is a subject-specific guide to concepts, theories, discoveries, pioneers and issues that meets the information need for core science studies. It includes approximately 1,000 entries and 350 photographs and illustrations with attention given to women, minorities and lesser-known scientists.

Explains essential facts about forces and movement, including gravity, friction, pressure, and simple machines. Includes experiments.