PUNXSUTAWNEY, PA - FEBRUARY 2: Groundhog handler John Griffiths holds Punxsutawney Phil after he saw his shadow predicting 6 more weeks of winter during 126th annual Groundhog Day festivities on February 2, 2012 in Punxsutawney, Pennsylvania. Groundhog Day is a popular tradition in the United States and Canada.
The Earth moves and things change. The days follow one after the other. Seasons come and go. Children can begin to understand these transitions by associating them with the way they affect what we wear and how we play from season to season.
Explore what causes seasons on Earth in this interactive produced by WGBH and adapted from NASA materials. The interactive features four cities at different latitudes (New York City, Miami, Singapore, and Melbourne) and provides information about their seasonal conditions at eight points in Earth's orbit. Illustrations show how the Sun's path through the sky and the angle of sunlight hitting Earth's surface vary depending on latitude of a location and Earth's position in its orbit. Text boxes describe the shape of Earth's orbit, how the duration and angle of sunlight influence the energy received at Earth's surface, and seasonal lag.
This interactive replaces “Earth in Motion: Seasons,” which was removed because of inaccurate content. This resource is part of the NASA Planetary Sciences Collection.
PUNXSUTAWNEY, PA - FEBRUARY 2: Groundhog handler Ben Hughes watches Punxsutawney Phil after he did not see his shadow predicting an early spring during the 125th annual Groundhog Day festivities on February 2, 2011 in Punxsutawney, Pennsylvania. Groundhog Day is a popular tradition in the United States and Canada.