THE WORK OF LEAVES 97 



6. Where do the water, the food material, and the ash of a 

 plant come from? 



7. How does water escape from the leaves? 



8. Why will corn break under the cultivator in the early 

 morning but not at noon? 



9. How can you find out how much water a plant gives off ? 

 10. State three ways in which the plant may use the food 



which it manufactures. 



