Formation of cloud is a physical change.Explain.

State whether the following statements are true and false. In case a statement is false, write the corrected statement in your notebook:- Formation of manure from leaves is a physical change.

Protein found in a biological system with a unique three dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in pH, denaturation of protein takes place. Explain the cause.