Takes the reader on a voyage of discovery as the author traces a single mass of air traveling from the Canadian Rockies to the northeastern United States.

Welcome to the wonderful world of weather! From the warm, balmy days of summer to the cold, crisp nights of winter, youngsters will learn all about the four sea

Look! The sky is getting cloudy. Does that mean light rain, a thunderstorm, or just an overcast day? Dylan hopes their soccer game won't be rained out. Bel the