Why must these foods be ground and cooked? 4. Which is the better food, white or brown bread? Why? 5. Could we live on starch-foods alone? What is the reason of this? 6. In what foods do we find nitrogen? In what, carbon? 7. What is a "complete food"? Name some. 8. Why must the starchy foods be changed in the body into sugar, or glucose? 9. Name three ways by which bread is made "light." 10.