Thursday, March 24, 2011

Diferentiate between physical and chemical change

Prepare the recipe of cake :  6 eggs -3cups of wheat  -1cup of milk-2small spoons of baking powder -half a small spoon of vinella -1.5 cup of sugar .
Mix these ingredients with a mixer .
Can you still smell the egg  ?Leave it for a time ,is there change in color?Is there formation of gas ?Touch the jar does it turn hot or cold with time  ?
Mixing the ingredients of the cake is not giving a new substance .Is it a physical change  or chemical change ?.

Bake the cake .What kind of change is taking place ?Explain by giving evidence ....

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