Curated OER
Relative Positions of the Earth, Moon, and Sun Over Time
Teacher pages for four different activities and three assessments are provided in this resource. Topics deal with how the sun's position and Earth's atmosphere affect the amount of solar energy reaching Earth's surface. The concepts and...
Exploratorium
Exploratorium: Science Snacks: Inverse Square Law
Learn about how the intensity of light is governed by the inverse-square law with this activity. Activity has you experimenting to find that the intensity of light decreases as the inverse square of the distance.