About this worksheet
A five-paragraph reading on the nervous system starts this 4-page 5th grade science sheet. It covers the brain's 86 billion neurons, tiny electrical signals, nerve signals that travel over 100 meters per second, how sleep helps memory, and why helmets and seat belts protect the brain. Four multiple-choice questions and two written responses follow, and question 3 asks students to explain the author's comparison of the senses to scouts. A final page gives the answers.



