NATVRE-STUDY LESSONS. 141 



3. Name other substances that are soluble in water. 



4. How does the water taste after the sugar has been 

 dissolved ? 



5. What two properties of sugar render it useful ? 



6. Name as many uses as you can to which sugar is put 



B. Kinds. 



7. {a) Examine different kinds of sugar obtained at a 



grocery store. 

 (b) Describe them, showing in what points they 

 resemble each other and in what points they 

 differ. 



8. (a) Taste raisins, dried currants, the pulp of the 



beet or banana, the sap of the maple and 

 birch. 

 (3) How does each of these substances taste ? 



C. Sources and Manufacture. 



9. Collect in the early spring some sap from the sugar 

 maple. What is its color ? Its taste ? 



10. {a) Place it in a kettle or dish over a hot fire and 



boil it. After boiling it for some time, note 

 its quantity and compare this with the 

 amount of sap at first placed in the dish. 

 (3) Account for this difference in volume. 



11. («) When the volume has been considerably dimin- 



ished by evaporation, taste the liquid. 

 {b) How does the liquid now compare in sweet- 

 ness with the sap when placed in the vessel ? 



(c) What is the color of the liquid now ? 



(d) How does the liquid now compare in density 



or thickness with the sap from which it has 

 been formed ? 



