Through observing shadows, identifying similarities and differences ion shadows, students will discover that in order for a shadow to form there must be a light source, an opaque object to block the light, and a surface for the shadow to fall.
(students; will discover; that in order for a shadow to form there must be a light source, an opaque object to block the light, and a surface for the shadow)
students
will discover
that in order for a shadow to form there must be a light source, an opaque object to block the light, and a surface for the shadow