Mi mundo random

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.

Invierno, primavera, verano y otoño--las estaciones son uno de los ciclos más familiares de la naturaleza. Pero, ¿por qué cambia el clima? Aprenda por qué los patrones climáticos cambian a lo largo de las estaciones. Winter, spring, summer, and fall--the seasons are one of nature's most familiar cycles. But why does the weather change? Learn why weather patterns change over the seasons.

A collection of words that turn into phrases, phrases that form verses, verses that make songs and songs that tell of adventures, jokes and mischief.

Novedosos libros que nos acercan al modo de vida de antiguas civilizaciones, con vasta informacion y laminas transparentes de acetato que al levantarlas descubren construcciones caracteristicas de cada cultura.