How fast can you run in a second? Six feet? A couple of meters? In that same second, light would travel more than 900 million feet (about 300 million meters). That's almost from Earth to the Moon! This length can be called a light second because it is the distance light travels in a second. (A "kid second" would be those six feet you just sprinted.)

Evaluate the author’s use of description in this passage. How does she help you understand what a light second is? Support your answer with evidence from the text.