¿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.

The poetry of Mercedes Roffe knows how to surround the silence, seduce the readers from an abyss feeling, and dares to skirt the limits in a plural sense. It is a return trip to the genesis and future of every word, a journey whose highest points happen whenever lightning appears. That is, whenever Roffe captures the poetic brilliance of words. She is currently one of the greatest voices in Argentine poetry. Some of the most sensitive aspects of human experiences are included in this ninth book of poems."

"«A mi padre lo mataron una tarde que hacía mucho sol, aunque no lo supimos en ese momento. Él estaba del otro lado del mundo, en la selva oscura de Angola.» La infancia de Ernesto termina con esa noticia, a los doce años, un día que regresa de jugar en el bosque de La Habana. A los ojos de los demás se ha convertido en el hijo de un héroe enviado, como tantos otros cubanos, a la guerra de Angola. Bajo el peso de esa responsabilidad, Ernesto comenzará a percibir la contradictoria realidad de la Revolución y a indagar obsesivamente sobre el largo periodo de la presencia cubana en...

Los Cuadernos Everest de Matemáticas son un excelente apoyo para trabajar los contenidos abordados en el área de matemáticas.

Healthy Habits is a collection of four stories featuring the Chiminis, fictitious characters that live in the forest and are as small as pine cones. In each story, one of the Chiminis has an adventure that highlights the importance of hygiene, a good diet, and exercise, and offers general health advice.