Move the torch and the screen to make the shadow grow and shrink. Try different materials: which ones make a shadow?
Words to know
Opaque
Blocks light completely, like wood or cardboard.
Translucent
Lets some light through, like butter paper.
Transparent
Lets almost all light through, like clear glass.
Shadow
A dark area made when an opaque object blocks light.
Quick check
Answer 3 questions to check what you learned.
Try at home
In a dark room, shine a torch at a wall and make hand shadows. Move your hand closer to the torch: the shadow grows. Move it closer to the wall: the shadow shrinks and gets sharper.