¿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.

A muchos de nosotros nos ha ocurrido alguna vez, creímos que existía otra dimensión además de las que ya conocemos y nos preguntamos si en verdad están ahí o si son meras ilusiones de nuestra frágil mente. Tal vez nunca encontremos una respuesta satisfactoria, tal vez perezcamos antes de averiguarlo, pero al menos sabremos que el mundo real siempre ha sido misterioso y cautivador para muchas personas.

In the third book in Andrea Camilleri's Montalbano series, the urbane and perceptive detective exposes a nest of corruption and international intrigue in a compelling new case. When an elderly man is stabbed to death in an elevator and a crewman on an Italian fishing boat is shot by a Tunisian patrol boat, only Montalbano suspects the link between the two incidents.

Learn about the rich history of Mission San Juan Capistranol: how it started, the people who ran it, the indigenous population, and its legacy today.

Consolidates the Student's Book lessons with targeted practice, unit by unit Additional practice of reading, writing, speaking, listening and use of English skills Extensive grammar and vocabulary practice Complete practice exam in Unit 10 Designed for independent study at home and practice in class Audio for listening lessons available on the Student's App