¿Por qué hibernan los animales? (Why Animals Hibernate)

When rocks change because of environmental conditions, the new rocks are called metamorphic rocks. A rock's chemical or physical makeup may change because of conditions such as temperature, stress, or pressure. Your readers will learn fascinating facts including where metamorphic rocks are most commonly found, the different types of metamorphism, and how metamorphic rocks are identified. Full-color photographs depict these rocks in nature. A helpful graphic organizer shows how these fascinating rocks form.

Diamonds and salt are both minerals, but diamonds are more rare than salt. Curious readers will learn what physical and chemical conditions must be present for minerals to form. They'll discover how minerals are identified and how they are used in daily life. Informative and interesting text presents readers with this science content in a fun way. A graphic organizer shows how different minerals are identified and fact boxes provide readers with exciting supplementary information.

At an early age, Steve fell in love with the possibility of the computer machine. He knew it had the power to change someone's life. Inspired to create a personal computer accessible for everyone, Steve went on to become one of the most influential inventors the world has ever met. This inspiring story of the visionary and entrepreneur features a facts and photos section at the back.

Young readers may have heard about the benefits of using and making the most of their resources, but how does that factor into an economic discussion? This thorough discussion defines resources and describes the different types of resources and why some divide them into three categories and others choose four. The book also addresses the concept of scarcity, showing readers how, because all resources have their limits, it is important to use them responsibly and efficiently in a healthy economy.

Un libro regalo comprometido con la educación y la diversidad. Para toda la familia. Un viaje alrededor de las escuelas del mundo. Conocerás los colegios, las costumbres y realidades de chicos de todos los continentes.

Margaret Mead y Gregory Bateson fueron leyendas en vida. Muchos autores escribieron sobre estos célebres antropólogos cuya influencia aún se percibe en el mundo entero, pero nadie alcanzó la profundidad ni la familiaridad que revelan estas memorias escritas con amor por su hija. Este retrato profundamente humano de Margaret Mead y Gregory Bateson, permite ver desde una perspectiva nueva sus extraordinarios descubrimientos y teorías.