How the milk change in to curd?

How do you know that milk is changed into curd ?Is there any change in its state ? Is there any change in its volume ? Is there any change In the weight?

Explain the causes of the given change. milk to curd

What type of change is seasonal change and what type of change is change of milk into curd?

Take three bowls and mark as A,B,C . Pour lukewarm milk in bowl. A hot milk in bowl B, cold milk in bowl C. Add one tea spoon of curd or butter milk in three bowls and stir them slightly. Cover the bowls with lids. Keep the bowls undisturbed for five to six hours. In which bowl milk turned into curd? Give your reasons.

Can you describe what happens when milk is converted into curd or yoghurt from your understanding of proteins?

This is not indication of changing milk in to curd.

Fresh milk has a pH of 6. Explain why the pH changes as it turns into curd.

What are the conditions that favour in chaging of milk to curd ?

Why do we add little amount of butter milk to get curd ?