Audience: Students; Grades: 4-5; Subject: Science. (2006) Describes the process of the Earth's orbit and rotation. Examines how these movements cause day and night, leap years, and the changing seasons. Also explains the reasons for the summer and winter solstice and the spring and vernal equinox. Concludes with a 5-question video quiz. For a teacher's guide go to: https://drive.google.com/folderview?id=0B9ZT7PYcIjLfdnZsQXFZdUNqV00&usp=sharing