¿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.

This Ever Popular Subject Is Explained In Detail In This Wonderful Book. How The Earth Is Made From Rock, The Three Different Types Of Rock And How They Are Made And Where They Can Be Found. Talks About How Fossils Are Formed From Sediment And What Role That Plays In Helping Us Learn About Life Long Ago. Talks About How These Fossilized Plants And Animals Became The Fossil Fuels That Are So Important To Our Present And Future Life On Earth.

Primavera del 67. América está en llamas, sacudida por disturbios raciales y por la protesta contra la guerra de Vietnam. En Nueva York, , varios músicos relacionados con la “new thing”, el jazz libre de Albert Ayler, Archie Shepp o Bill Dixon, apare- cen muertos en extrañas y violentas circunstancias. En los guetos del Black Power se habla de un asesino llamado El Hijo de Whiteman. ¿Existe realmente? Y, si es así, ¿actúa por su cuenta o es mero instrumento de un “establishment” asustado? Mientras, John Coltrane, guerrero y guardián de los espíritus en esa libérrima...

Introduces readers to mammals and the concept of classes of animals. Simple text describes the common features and behaviors of mammals as well as offering many examples of creatures in this group.

Biddy Mason's life began as an enslaved person, but she became a successful nurse, midwife, and land owner. She left behind a legacy of caring and charity and influenced Los Angeles’s history. This Spanish biography builds reading comprehension and social studies literacy. With a visually appealing layout, this book features captivating text, fun facts, sidebars, and time lines that help students grasp the essential concepts they need to know at their grade level. Packed with information and primary source maps, images, and documents, these books are perfect for reports or projects. The Read ...