Mi libro de adivinanzas y trabalenguas / My Book of Riddles and Tongue Twisters

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.

Un líder asesinado, una duda, una locura ¿fingida?, una venganza. William Shakespeare estrenó Hamlet entre 1600 y 1602... ¿sigues pensando que los clásicos son cosa del pasado?

Having a job and earning money are a part of everyday life for most people, especially adults. The concept seems fairly straightforward: one works to earn. This volume discerns the difference between a job and a career, as well as how a job can develop into a career. Readers will learn why a community's economy needs jobs, how paying someone to do a job helps the person who is paying them, and even about job loss and its consequences. The text also explains different jobs and their effects on the economy, such as those of professional, production, arts, and government and military jobs.

Introduce cachalotes, incluyendo sus diferentes partes del cuerpo, la forma en que viajan en grupos, lo que comen, y cómo cuidan a sus crías.