Autum is the season that falls between summer and winter. There are many changes that begin in this fascinating season. Days become shorter. Leaves of trees turn from green to vibrant red, yellow and orange. Trees need sunlight to keep their leaves a lively green. Without sunlight leaves turn colors. The grass is no longer blanketed with dew but with frost, almost every morning, as temperaturesb reach the freezing. Animals start storing up a food supply to laht through the long winter months. These changes occur as we adgust from the heat summer o the chill of the winter.