Learners investigate the concept of a shadow. They design a tool to create shadows for an experiment. They make observations and record the size and shape of shadows. The lesson contains background information for the teacher to deliver...

Students classify the visual opacity of various materials, what is needed to create shadows, and classify clouds by the types of shadows that they produce.

How do the moon, sun, and Earth line up to create eclipses? Why do the seasons change throughout a year? The answers to these questions are explained through this series of slides. This apt presentation outlines information using bullet...

Students classify clouds as transparent, translucent or opaque. They conduct an experiment to determine the visual opacity of several classroom objects and then conduct further observations of clouds.