About this worksheet
A five-paragraph reading about the heart opens this 6-page 5th grade science sheet. It covers the size of a fist, about 100,000 beats a day, the lub-dub sound made by valves, and how exercise and a balanced diet keep the heart strong. Nine questions follow: four multiple choice, a comparison to delivery trucks, a vocabulary question on valves, a true or false table with evidence, and two longer responses. A two-page answer key includes a sample response.





