EXERCISE 49 



Make a plan for an experiment that will answer the question, Is water essential to the process 

 of starch-making ? 



Make a plan for an experiment that will answer the question, Is carbon dioxid essential to 

 starch-making ? 



After comparing notes in class, to select the most reliable and the most workable plan, work out 

 the answer to one or both questions experimentally and make a complete report. 



[54] 



