In this science-based storybook, children learn that clouds have different names based on their appearance and position in the atmospheric column. Contrails, or condensation trails, are also discussed. The book is one of a series in the Elementary... (View More) GLOBE unit designed to introduce students to the study of Earth system science (ESS). Each book has companion learning activities that complement the science covered in each story. Together, the books form an instructional unit that addresses ESS and related subjects (e.g., weather, water, seasons, soil, and aerosols). The GLOBE Program is a worldwide, hands-on, K-12 school-based science education program. (View Less)

This identification chart is a basic guide to observing contrails. It shows examples of the three types of contrails: short-lived, persistent, and persistent spreading. The chart is intended for use by students participating in the GLOBE program.... (View More) GLOBE (Global Learning and Observation to Benefit the Environment) is a worldwide, hands-on, K-12 school-based science education program. (View Less)