Tigre callado escribe poesía

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.

Simple text and pictures introduce facts about snowplows and tells what they are used for and why they are important.

Discusses the various features of Australia, including its climate, mountains, rivers, lakes, animals, vegetation, coral reefs, flightless birds, population, and cities, and history of the Aborigines.

Las flores brillantes, los tiernos animalitos, las plantas frescas. ¡Hay colores por todos lados en la primavera! Explora los colores del mundo a tu alrededor. ¿Qué colores te hacen pensar en la primavera? ¿Qué puedes crear con los colores de la primavera? Anima a los lectores a reconocer el color del mundo real y a crear sus propias obras de arte inspiradas en la primavera por medio de fotos vibrantes y texto lírico. Bright flowers, cute baby animals, fresh plants--colors are everywhere in spring! Explore color in the world around you. What colors make you think of spring? What can you ...