1. Main character
Sodium

2. Write the summary of the book.

Nerves need sodium to function normary. Without sodium, nerves would not be able to send information to different parts of the body. Without sodium, the nerve would not be able to send informatin to the brain. As a result, a person would not see anything.
Muscles also depend on sodium. Nerves control muscles that are attatched to bones. As the muscles contract, they move the bones. Without sodium, a person would not be able to move parts of the body, such as the head, arms, or legs.

3. Write your feelings about the book in details.

.....This step was taken to help reduce light pollution that was interfering with the work of astronomers at a nearby university. Today, that law is no longer in effect(See p 32).

It was so light for astronomers to study!

4. Write the words, phrases or sentences that impressed you most in the book and explain why they impressed you. Or you could write your questions about the book.

Another usuful compound is sodium bicarbonate, which is commonly known as baking soda(See p 35).

If it were no sodium bicarbonate, we can't eat tasty bread! ( )