The whole class can do this experiment together. Take a piece of bread or roti. Sprinkle a few drop of water on it, and put in a box. Close the box. See the bread or roti everyday until you find some changes on it. Make this table on a chart paper and put it up in the classroom. Fill up the chart everyday after discussing the changes seen.

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Day                  

 
Changes in the Bread or Roti
By touch                           By Smell                                By looking Through hand lens By colour
1 Clammy, Soft                                 Clammy, Soft                                   Normal Normal
2 -do- -do- A velvet like white layer Slightly white                         
3 Moist, soft Stinking smell -do- White
4 -do- -do Greenish-white coloured small grass like structures Greenishwhite
5 -do- -do Green-coloured Small grass Like structures Green
6 -do- -do Greenish-black coloured small Grass like structures Greenishblack

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