Animales Al Natural un Zoológico Portátil

Readers may never expect that they might free fall to Earth, but if they have ever dived into a pool, that's exactly what they've done. This book shows readers how Newton's three laws of motion affect divers, skydivers, and mountain climbers' movements. Readers discover who uses gravity, and who works against it, and all other forces that contribute to a successful dive or climb. After reading this book, readers can decide if they will ever be interested in engaging in one of these extreme sports.

Eleven-year-old Jenny, whose family came from Russia to America to start a new life, meets the famous Russian composer on his 1891 trip to the New World and writes about it in her diary.

Este libro ofrece una introducción a todas formas de vida en el océano y discute como el hombre ha dañado su ambiente.

"Esta delicada historia enfoca la relación entre dos niñas que se encuentran en un campamento veraniego y describe la cálida amistad que se desarrolla entre ambas pese a que una de ellas tiene el síndrome de Down"--P. [4] of cover.