¿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.

La adquisición de conocimientos e información nos puede significar la diferencia entre el éxito y el fracaso. La falta de conocimientos puede ser y lo es, costoso, doloroso e incluso fátal. Este libro ha sido diseñado especialmente para aquellas personas que por una u otra razón han tenido que dejar a su pais de origen e inmigrar a este maravilloso país: “ESTADOS UNIDOS DE AMERICA”. El contenido de este libro está basado en la búsqueda de información en diferentes medios de comunicación y experiencia propia. No debe ser tomado como una asesoría legal. Yo, como inmigrante,...

People have been mystified by the Milky Way since ancient times. The Milky Way contains over 200 billion stars, but it is also made up of gases, dust, stars, planets, and solar systems. With detailed images and fascinating sidebars, this nonfiction Spanish book explores the Milky Way in depth, and introduces students to new concepts, vocabulary terms, and STEM topics. Aligned to state and national standards, the leveled text supports students reading at above-, below-, and on-grade level. The fun lab activity encourages students to think like scientists. Keep students engaged in learning with ...

Three Quarters Of Our Earth Is Blanketed By Water. How This Water Is Used, From Bathing To Irrigating Crops Is Addressed. That Water Travels In A Never-Ending Pattern Called The Water Cycle. Tips On How To Conserve Our Most Important Natural Resource Are Included.

Con el otoño llegaron el viento y el frío. Los días cada vez eran más cortos, las noches eran más largas y todo el jardín se preparaba para el reposo. Pero Margarita era una flor muy curiosa y quería ver la nieve. Un cuento sobre el miedo.