Explains what sound is and how we hear sound.

Sound is created through vibrations that vary in pitch and volume. This creates sound-waves that ...

Discusses the nature, uses, and importance of soil and the many forms of life that it supports.

Compasses and magnetite, magnetic poles and motors - learn about how magnets affect our lives.

Discover the world of sound in this charming nonfiction tale. Young science fans will learn how s...

The Great Barrier Reef teems with life. From algae to a grey reef shark, the animals in this book...

Features: Reading Consultants - Table of Contents - Activities - Fun Facts - Glossary - Index Sta...

Arena, sedimento, erosión y humus. Vívidas ilustraciones y textos claros llenos de información ex...

Features: Reading Consultants - Table of Contents - Activities - Fun Facts - Glossary - Index Sta...

Discusses the nature, uses, and importance of soil and the many forms of life that it supports.

Describes the water cycle and the importance of water, explaining evaporation and condensation, d...

The rocks you see everyday can be grouped into different types, like igneous, sedimentary, or met...

Piedras preciosas y minerales, fósiles y sedimento. Vívidas ilustraciones y textos sencillos expl...

The rocks you see everyday can be grouped into different types, like igneous, sedimentary, or met...

Features: Reading Consultants - Table of Contents - Activities - Fun Facts - Glossary - Index Sta...

Features: Reading Consultants - Table of Contents - Activities - Fun Facts - Glossary - Index Sta...

Brjulas, imanes, polos magnticos y motores. Vvidas ilustraciones y textos sencillos exploran la a...

Briefly explains the effects of light and includes experiments to demonstrate.

Brújulas, imanes, polos magnéticos y motores. Vívidas ilustraciones y textos sencillos exploran l...