What is the difference between the physical changes and the chemical changes ?

The Physical  and the Chemical changes of the matter

You know that the changes that may occur to the matter are the physical changes and the chemical changes .

The difference between the chemical changes and the physical changes .

The physical change 

 

You should know that the physical change is a change in the shape of the matter without any change in its structure ( properties ) .

 

Examples of the physical changes 

The physical changes in the matter .

When you grind the chalk or the sugar into the powder .

 

The change of the water ( The matter ) from one state to another ( ice cycle ).

The ice cycle is a physical change .

When any solid matter melts as the wax , the chocolate and the ice .

 

When you dissolve the table  salt or the sugar in the water .

 

When you cut the paper into the small pieces and when you make the paper recycling .

 

The malleability  , the ductility and the bending of the elements .

 

The chemical change

The chemical changes in the matter .

You  should know that the chemical change is a change in the structure of  the substance producing a new substance or new substances with the different properties .

 

Examples of the chemical change

 

When  you burn any matter as ( the wood , the sugar ,  the paper or a candle ) .

 

when the iron rust , the shape and the structure of the cleaning iron change as it is exposed to the wet air .

 

When you add sodium bicarbonate to vinegar .

 

When you add the yeast to the pastry ( doughs ) .

 

In the production of the yoghurt from milk .

 

In the fermentation of the fruits or the sugar .

 

In the digestion of the food .

 

Examples of the chemical changes and the physical changes .

Notes 

 

You should notice that the melting of a candle is a physical change , while the burning of a candle is a chemical change . 

 

You should know that the freezing of any liquid matter as water is a physical change .

 

You should know that the evaporation of the water to form the water vapour and the condensation of the water vapour into the water drops are physical changes .

 

You should know that the boiling of water and the melting of any solid matter are physical changes . 

 

The chemical changes and the physical changes of the matter .

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