24 HOW PLANTS FEED 



follows that the health of the plant depends upon the 

 health of its leaves. 



QUESTIONS AND EXERCISES. 



1. How do plants take in the mineral part of their food? 



2. What food materials do plants obtain from the air? 



3. Tell how a plant makes starch. 



4. Why will a plant die if its leaves are removed during 

 the growing season? 



5. Explain why the grass underneath a board or flat 

 stone turns white in a few days. 



6. Name several plants that suffer because their leaves 

 are destroyed by insects. 



