Provides answers to questions related to electricity, including information on circuits, turbines, and light bulbs.

Basic information about light and its properties.

The follow-up to the fun and informative 20 Questions #1: Why Do Feet Smell? A follow-up to 20 Questions: Why Do Feet Smell? (Spring 2012) featuring fun facts about animals. Why Do Zebras Have Stripes? will ask and answer the questions about animals that kids are really curious about. Each book in the 20 questions series contains 20 questions and answers, with a full-color photograph on every page. Read the question on the right and turn the page...

The United States grew slowly at first, but beginning with the Louisiana Purchase in 1803, it grew steadily and new states were formed from the territories. The author asks and answers twenty questions about this westward expansion that lasted until 1959 when Alaska and Hawaii were added.

Questions and answers about the human body.