Readers will learn the difference between transparent, translucent, and opaque materials and see how each is used in everyday life. Each book in the ‘My World of Science’ series explains science that you see in the world around you and use every day.Readers will learn the difference between transparent, translucent, and opaque materials and see how each is used in everyday life. Each book in the ‘My World of Science’ series explains science that you see in the world around you and use every day.