Students learn about a sunflower and other plants through observation, estimation, and counting.
Seasons are caused by the 23.4-degree tilt of Earth's axis, which alternately turns the North and South Poles toward the sun. In the United States, there are 10 federal holidays set by law. This list of weather terms includes their definitions. This article explains why the first day of spring occurs in March. A child describes the changes a sugar maple tree undergoes through the year.