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

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.

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.

Los personajes de esta colección, un dragón, una momia y el capitán de la isla Calavera, han escondido sus tesoros. Llegar hasta el final de la aventura para encontrarlos no será nada fácil. Unas historias llenas de aventuras y criaturas espeluznantes. ¡Cuidado!, porque pueden asomar la cabeza entre las páginas.

Los años noventa del siglo pasado fueron testigo de un florecimiento notable de las reflexiones estéticas consagradas a la estética. Lo más sorprendente es que estos debates encontraron, al menos durante cierto tiempo, un eco público más allá de la esfera de la filosofía profesional, sobre todo en lo que se ha dado en llamar «el mundo del arte». De ahí a creer en un renacimiento de la propia doctrina estética no hay más que un paso, que algunos filósofos se han apresurado a dar. El objeto de este ensayo es mostrar el carácter ilusorio de una creencia así incluso de una...

Read Along or Enhanced eBook: Jane Goodall had a passion to learn about animals. Readers will learn all about her adventurous life among chimpanzees and other primates in this inspiring, Spanish-translated nonfiction biographical title. Children will be fascinated by the vibrant images, stimulating facts, and accessible glossary that will assist in vocabulary improvement.

It was September 14, 1814, and America and Great Britain were at war. Frances Scott Key watched from the deck of a British ship, where he was being held captive, as cannons exploded around them. After 25 hours, the fighting ceased and Key peered through the clearing smoke, looking for some sign as to the outcome of the battle. Was the American flag still flying? His wartime experience inspired Key to write a poem, which was later set to music and became America’s national anthem. This book tells the story of the inspiration behind our national anthem, which helped transform the flag into a...