S CIENCE EXPERIMENT ---------------------------------- Bacteria growth in the various parts of the house.

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Presentation transcript:

S CIENCE EXPERIMENT Bacteria growth in the various parts of the house

T HE PLAN FOR THE EXPERIMENT Materials : measuring instrument to an accuracy to of 0.1cm3 & can measure from cm3 at least, cotton swabs, Petri dish, thermometer Materials to make Agar nutrients: agar powder 1.5g, Bovril 2g, sodium chloride 0.5g, water 10cm3 Step 1: mix all the materials to make agar nutrients (agar powder 1.5g, Bovril 2g, sodium chloride 0.5g, water 10cm3) into a paste then slowly add water with stirring until the mixture reaches to 100cm3.

T HE PLAN FOR THE EXPERIMENT Step 2: Heat the mixture in a boiling water bath to 95 °C in the required container. Step 3: pour the mixture evenly into six petri dishes evenly.

P REPARATION PICTURES Nutrient agar in petri dishesPetri dishes put in ziploc and numbered Mixing the materials together Heating the mixture to required temperature

D AY 1 9/12 No difference

D AY 2 10/12 No difference

D AY 3 11/12 Piano keys: nothing Door knobs: nothing Dining table: bacteria growth starts Hand phone: nothing Computer keyboard: nothing TV button: nothing

D AY 3 PICTURES Petri dish no. 3 Overall pictures of petri dishes

D AY 4 12/12 Piano keys: growth starts -1 st Door knobs: growth starts -3 rd Dining table: bacteria growth continues -2 nd Hand phone: nothing -6 th Computer keyboard: a bit of bacteria growth noticeable - TV button: a bit of bacteria growth noticeable

D AY 4 PICTURES Overall shot of the Petri dishes Petri dish 1Petri dish 2Petri dish 3 Petri dish 4 Petri dish 5 Petri dish 6

D AY 5 13/12 Piano keys: most amount of bacteria growth -1 st Door knobs: 4 th Dining table: 2 nd Hand phone: growth starts -6 th Computer keyboard: 5 th TV button: 3 rd

D AY 5 PICTURES Petri dish 1 Petri dish 2 Petri dish 3 Petri dish 4 Petri dish 5 Petri dish 6 Petri dish overall shot

D AY 6 14/12 Piano keys: most amount of bacteria growth -1 st Door knobs: least amount of bacteria growth noticeable -6 th Dining table: -3 rd Hand phone: -4 th Computer keyboard: -5 th TV button: -2 nd

D AY 6 PICTURES Petri dish 1Petri dish 2Petri dish 3 Petri dish 4Petri dish 5 Petri dish 6 Petri dish overall

D AY 7 15/12 Piano keys: nothing Door knobs: nothing Dining table: bacteria growth starts Hand phone: nothing Computer keyboard: nothing TV button: nothing

D AY 7 PICTURES