Unit -13 Changes In Matter / பொருளில் மாற்றங்கள்

Tarnishing of metals,Candle flame,Bunsen flame,Neutralisation

Water/water vapour and oxygen are essential for the rusting of iron.Rusting can be prevented by methods such as applying paint, galvanizing and applying grease.

Fire triangle

identify the products formed during the combustion of fuel.

Law of conservation of mass.

During chemical reactions the total mass does not change. That means the

Changes in Matter

Changes of state as chemical changes . Video description:- Observations in support of the formation of new substances in chemical reactions.

The changes takes place in matter is of two types, physical changes and chemical changes.

Explanation of The changes takes place in matter is of two types, physical changes and ,chemical changes.

Changes of state as physical changes .

During a change of state no new substances are formed by changing the composition. Therefore, the changes of state are physical changes.