Introduction & Teacher Background
Winter is the season of the longest night, the shortest day, the least light, and snow, cold and wind chill. It is the slowest growing season for plant life. Food supplies dwindle and it is a hard time for animals.
Winter solstice (December 21) is the day winter “officially” begins. On this the shortest day of the year, the sun is at its lowest point in its journey through the seasons.
As the earth travels around the sun, different regions receive more direct sunlight than others. The tilt of the earth on its axis is responsible for the different seasons in the northern and southern hemispheres. More...