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Monday, July 7, 2014

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


The Physical  and the Chemical changes of the matter

The matter changes

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

The properties of 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 

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 ).

physical change
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 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 .

 

The examples of the chemical changes and the physical changes
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
The chemical changes and the physical changes of the matter .

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