The microbes might then get into the air, form ice crystals in clouds overhead, and pull more rain from them. (discovermagazine.com)
When the snow gets packed down by subsequent layers, the space between the crystals is eventually sealed off, trapping a small sample of the atmosphere in newly formed ice. (earthobservatory.nasa.gov)
This summer reading sticker chart is two templates that are glued together to form an ice cream cone. (uniqueteachingresources.com)