¿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.

Está bien comprobado que, tal como dice Conrad, la misma violencia de un golpe de adversidad nos ayuda a soportarla, haciéndonos momentáneamente insensibles. Cuando la anestesia natural cede el paso al malestar, cada cual inventa un modo para poder sobrevivir a ese dolor. En Dime quién fui Elisa Rodríguez Court encuentra la provisional salvación en la literatura, fuente de experiencias que nos recuerdan en todo momento que el drama es de todos y que la vida, como cualquier libro, no pasa en realidad nunca de ser un proyecto. La desesperación de Dime quién fui es la desesperación de...

As they say, necessity is the mother of invention, and this book introduces readers to 14 women who invented very useful, helpful items. They include Chicago native Margaret Wilcox who invented the car heater, Indiana native Marion O'Brien Donovan who invented disposable diapers, Pennsylvania native Stephanie Kwolek who invented Kevlar, and Austria-born actress Hedy Lamar whose secret communications systems led to the creation of WiFi, Bluetooth, and GPS.

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 ...

"No matter what the weather's like outside, crafts are an easy and fun way to spend an afternoon. Whether painting with friends or making flowers out of paper, crafts can turn the day into an awesome adventure. Using simple craft supplies like paper and drawing tools, even the youngest of children can find engaging ways to play. With the help of accessible text paired with colorful photographs, early readers will experience the creative world of arts and crafts."