The chemical name of baking soda is __________.

Chemical changes are  ___________. 

___________ is made by mixing iron with carbon and metals like chromium,nickel and manganese.

Germination of seeds is a _________. 

_________ is produced when magnesium oxide is mixed with water.

The process of depositing a layer of zinc on iron is called __________.

Burning of wood is a _________ change.

For rusting,the presence of both _______ and ________ is essential.

_________ acts as a natural shield against ultraviolet radiations.

The formation of rust on the surface of iron is called __________ of iron.