Fill in the Blanks:
(a) When a fully blown balloon is pricked, it ………………
(b) Pencil changes its …………….. and size with repeated use.
(c) Iron is heated till it becomes red hot and soft to be ……………… into a desired shape.
(d) Ice ……………. when it is heated.
(e) The change of milk to paneer is a ……………….. change.
(f) When two substances are mixed together, they undergo …………… only on heating.