Science+Fair+Notes+LM

My science fair project is about how long it takes for milk to become sour milk ?

notes Source 1 http://answers.ask.com/food_and_drinks/food_and_cooking/how_to_make_sour_milk_for_baking I know this is a valid website because experts answer questions Source 2
 * One of the ways that milk can turn sour is by adding vinegar to it.
 * Then you have to wait a couple of minute.
 * =====A very simple way to make sour milk, other than the obvious way which would be just to  let it sit and go sour, is to add a little vinegar or lemon juice to the fresh milk. One teaspoon per cup should be sufficient. =====

[]
I know this is a valid website because experts know all the answers to the questions. Source 3 [] I know this is a valid website because it tells you all the information you need to know.
 * Milk turns sour due to the growth of microbes found in it.
 * Milk contains a lot of bacteria.
 * To make it not get sour, the bottling company makes sure that they are pasteurized it & make it suitable for drinking & storage.
 * Milk turns sour because as it ages or sits out for too long, the bacteria multiply and consume lactose (milk sugar).
 * Milk has at least a couple types of bacteria which provide a sweet taste and sour taste.
 * Soured milk is a food product, produced from acidify of milk.
 * It is not the same as spoiled milk that has soured naturally & which may contain poison.
 * The acid causes milk to coagulate & form a thicker consistency & inhibits the growth of harmful bacteria & thus improves its shelf life.
 * Soured milk that is produced by bacteria fermentation is more specifically called fermented milk or cultured milk.
 * Soured milk that is produced by the addition of an acid, with or without the the addition of microbial organisms, is more specifically called acidified milk.

=Work Cited= How to Make Sour Milk for Baking?" //- Ask.com Answers//. N.p., n.d. Web. 26 Sept. 2013. .


 * I know this is a valid website because experts answer questions.

Moyer, Richard. //McGraw-Hill Science //. New York: McGraw-Hill School Division, 2000. Print.


 * Because it gives you a lot of information.

"Soured Milk." //Wikipedia //. Wikimedia Foundation, 29 Aug. 2013. Web. 26 Sept. 2013. .
 * This is a valid website because it tells you everything you need to know about.

Why Does Milk Turn Sour?" //- Ask.com //. N.p., n.d. Web. 26 Sept. 2013. <http://www.ask.com/question/why-does-milk-turn-sour>. <span style="background-color: #ffffff; display: block; font-family: 'Times New Roman',Times,serif; font-size: 16px;">
 * I know this is a valid website because experts know all the answers to the questions.