EXPERIMENTT

i started the experiment on Wednesday the 2nd of June, i changed the method a bit before i started, here's is what i did

1. the materials were collected:
i thought i will mention this i kinda stole my grandpa's box of zip lock bags, the bag of cotton swabs, the box of gloves and i borrowed the cup. the ruler, marker and scissors are mine. the dropper i got from the chemistry kit box that i put in the background, which i asked my mum to buy when i was young but i never did any of the experiments (maybe when i finish the srp i should do some of them). please ignore the toothpick container thing.

2. i realised that i couldn't really cut 10x10x2cm squares so i decided to cut 8x8x2cm squares, the depth of the slices were roughly the same. what i did was, i used the crust that no one likes and i ruled the lines and i cut a sample. i used this sample as a guide to cut the rest of the slices. 10 with preservatives and 10 without.

3. Each zip lock bag was labelled accordingly

4. 5 slices with preservatives where each put in the
'Preserv clean' zip lock bags and 5 slices of bread without preservatives where each put into the 'Non-preserv' clean' zip lock bags.

5. using the cotton swab, swab some dust on the center (on one side)of each of the 5 remaining bread slices with preservatives. Then using the dropper, 5 drops of water were dropped spread out around (on one side) on the slice of bread. place each slice in the 'preserve dust' zip- locked bags.

6. Repeat step 5 with the bread slices without preservatives.



7. 2 boxes were obtained. one labelled 'clean' the other 'dust'. the zip lock bags labelled with 'preserv clean' and 'non-preserv clean' were placed in the 'clean' box. The other bags were placed in the 'dust' box.

8. the boxes were put side by side in a dark covered spot.