Scientists have theorized that our solar system formed 4.6 billion years ago. In this pair of activities, learners first hypothesize how our solar system was formed. Using this information, groups then determine how scientists search for...

I bet I can cross the room without having the lights come on. Class members set up an experiment in which they try to determine what materials will mask motion detected by a sensor. Groups predict how materials will interact with...

How does the color of the sky change from blue to reds and oranges to black? An illuminating lesson explains how light travels through different mediums using the sun's light as an example. By examining diagrams and illustrations, pupils...