Wednesday, 13 September 2017

Crystallization of milk



Crystallization of milk


Procedure:

Step 1: We pour the milk into the zip lock, close it and put it in the container.



Step 2: Put the ice on its zip lock, and then pour the salt on the zip lock.


Step 3: Shake the test tube rack by push and pull it.


Step 4: After shake it, the milk will be freeze and you can eat it! In addition, you can add some topping if you like it.


Result: It is very delicious!




Questions

1)  why do we add salt to the ice?
Answer: It destroys water's bond so the temperature drops down faster.

2)   why do we add the cookies and other things, only after the milk has frozen slightly
Answer: Because some topping is heat capacity so it will slow down the process.

3)  what are two factors that affect the freezing you think?
Answer: Movement and temperature.

4)  why do you need a bit of air in the bag?
Answer: For the milk to move around to make contact with the ice.




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