Crystallization of milk
1) why do we add salt to the ice?
Ans: salt make not melt easily
2) why do we add the cookies and other things, only after the milk has frozen slightly
Ans: to make cookies and other thing freeze with milk easily
3) what are two factors that affect the freezing you think?
Ans: salt and shaking
4) why do you need a bit of air in the bag?