El queso y los gusanos

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and nothing would make any noise. Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments that will appeal to readers of all ages.

"In search of "Don Quixote" from other side of the estimate that there are no gaps between the various fields of knowledge and literary productions that are specific manifestations of a global representation system historically determined. So, it seemed necessary to put Don Quixote in its various circumstances, linking it to the contexts under which it has set, especially regarding attitudes and references involved, not to mention the cultural particularities that arise in him, both scholarly and popular. Hence, the approaches used, of a historical, anthropological and literary, to go for the ...

Learn the many steps that must be followed to make a car! With vibrant, detailed photos, informational, Spanish-translated text, and a chart to show steps of the assembly line, even the most reluctant reader will want to learn more about this fascinating factory!

Read Along or Enhanced eBook: Jane Goodall had a passion to learn about animals. Readers will learn all about her adventurous life among chimpanzees and other primates in this inspiring, Spanish-translated nonfiction biographical title. Children will be fascinated by the vibrant images, stimulating facts, and accessible glossary that will assist in vocabulary improvement.