Question

Can anyone explain ? 


------------------------------------------------You will need –--------------------------------------------------------------- 
 Dry yeast 
 3 Clear glass cups 
 2 Teaspoons sugar 
 Water ( warm and cold ) 
 3 Small dishes 
 Permanent marker 
TO STUDY CONDITIONS FOR GROWTH OF YEAST 
Procedure – 
 Fill all three dishes with about 2 inches of cold water 
 Place your clear glasses in each dish and label them 1, 2, and 3. 
 In glass 1, mix one teaspoon of yeast, ¼ cup of warm water, and 2 teaspoons of sugar. 
 In glass 2, mix one teaspoon of yeast with ¼ cup of warm water. 
 In glass 3, place one teaspoon of yeast only in the glass. 
 Observe each cups reaction. Try using more of your senses to evaluate your three glasses; sight, touch, hearing and smell especially! 
Why do you think the reactions in each glass differed from one another? In which glass did you observe foaming and why? What is the effect of sugar on yeast?

Answer 1

Fermentation is a chemical process of breaking down a particular substance by bacteria, microorganisms, or in this case, yeast.The warm water and sugar in glass 1 caused foaming due to fermentation.
 the sugar fermentation process gives off heat and/or gas as a waste product.