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 every day after discussing the changes seen.

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Solution

Changes in the Bread or Roti.

Day By touch By Smell By looking Through hand lens By colour
$1$ . Clammy, Soft Lighting stinking smell Normal Normal
$2$ . Clammy, Soft Lighting stinking smell A velvet-like white layer Slightly white
$3$ . Moist, soft Stinking smell A velvet-like white layer White
$4$ . Moist, soft Stinking smell Greenish-white coloured small grass-like structures Greenish white
$5$ . Moist, soft Stinking smell Green-coloured Small grass Like structures Green
$6$ . Moist, soft Stinking smell Greenish-black coloured small
Grass-like structures
Greenish black

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Similar questions

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Take a tin can with a lid and fill it half with water. Heat the can on a candle flame till the water boils. Let the water boil for a few minutes and immediately put the lid tightly on the can. Pour fresh water over the can. You'll see the shape of the tin box changes. This is due to:

Take a tin can with a lid and fill it half with water. Heat the can on a candle flame till water boils. Let it boil for a few minutes and immediately put the lid tightly on the can. Pour fresh water over the can. You can see a shape change for the tin box. What is the reason for the change in shape?

Q. Take a glass and fill it up with water up to the brim. Make sure that there are no air bubbles. Take a thick, stiff piece of cardboard and put it over the glass. Place your hand over the card and quickly turn the glass upside down. Now slowly remove your hand.
What does this experiment show?

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Day	By touch	By Smell	By looking Through hand lens	By colour
$1$ .	Clammy, Soft	Lighting stinking smell	Normal	Normal
$2$ .	Clammy, Soft	Lighting stinking smell	A velvet-like white layer	Slightly white
$3$ .	Moist, soft	Stinking smell	A velvet-like white layer	White
$4$ .	Moist, soft	Stinking smell	Greenish-white coloured small grass-like structures	Greenish white
$5$ .	Moist, soft	Stinking smell	Green-coloured Small grass Like structures	Green
$6$ .	Moist, soft	Stinking smell	Greenish-black coloured small Grass-like structures	Greenish black