- the solstice that marks the onset of winter, at the time of the shortest day, about December 22 in the northern hemisphere and June 21 in the southern hemisphere.
Winter days have fewer hours of daylight because of the path the earth takes as it revolves around the sun. The earth completely revolves around the sun during 365 days. The earth's axis always tips about 23 1/2 degrees from a line perpendicular to its path.
In regions where there is cold weather, it causes many changes in the environment. Water may freeze and become ice, snow, sleet or icicles. Sometimes it gets so cold, boiling water will vaporize!
(Thanks Mrs. Rose from Ontario, Canada, who created this Vine two Decembers ago!)
Most plants and animals become dormant and rest. Some animals hibernate. The only plants that grow and remain green are evergreens. People protect themselves from the cold climate with winter clothing when they go outdoors. They enjoy a variety of indoor activities or outdoor winter sports such as skiing, skating, or sledding.














