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

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

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.

Learn how technology has improved lighthouses over time with this book that features a hands-on STEAM challenge and uses real-world examples to give insight into how the engineering design process is used to solve problems.

Todos conocemos la obra de Vincet Van Gogh, pero ¿Sabes cómo fue que se inició en el arte? En una pequeña ciudad en Holanda vive el travieso Vincent Van Gogh, un pelirrojo con las mejillas llenas de pecas al que le encanta meterse en problemas. Junto a su inseparable hermano Theo, pasa sus tardes buscando nidos y mirando las estrellas, descubriendo una manera de ver el mundo que hoy puedes encontrar en pinturas colgadas en museos de muchos países. Aquí conocerás cómo fue la niñez de este famoso pintor impresionista y cómo inició su camino para convertirse en uno de los artistas...

Where did the sunflower come from? How does it grow so tall? How can its thin stalk support such a large and heavy head? These and many other questions are answered in this dazzling book. Using lushly detailed illustrations and photographs, the book takes us inside the sunflower to examine its stem, root system, leaves, and flowering heads, proving an understanding of this unique plant's structure, growth, flowering, reproduction, and cultivation.

En los veintiséis relatos que contienen este volumen, Gianni Rodari plantea y describe de forma magistral situaciones llenas de humor, imaginación y fantasía, para ofrecernos su visión del mundo que nos ha tocado vivir.