THE FOODS WE EAT 



especially fruits, causing them to ferment or " work " 

 and become unpleasant to the taste. 



Molds in the Home. Mold is one of the most common 

 enemies of food in the home. Molds do considerable 

 damage, although they do not necessarily render food 

 unfit to eat. You may remember scraping the layer of 

 mold from cheese before using it. As a matter of fact, 

 certain cheeses get their flavor from the molds that grow 

 in them. Molds attack other substances besides food, 

 and frequently grow on shoes, leather, paper, or moist 

 wood. 



Proof that Bacteria Are Living Things. How do we 

 know that bacteria cause decay ? We cannot see bacteria 

 unless we have a powerful microscope, but it is possible 

 for us to prove that bacteria really do cause things to 



Preparing Petri dishes for an experiment. After the culture media is poured into 



the dishes they are sterilized again to make sure no germs got in from the air 



before the dishes were covered. 



