s cience experiment ---------------------------------- bacteria growth in the various parts of the...
TRANSCRIPT
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SCIENCE EXPERIMENT----------------------------------Bacteria growth in the various parts of the house
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THE PLAN FOR THE EXPERIMENT
Materials : measuring instrument to an accuracy to of 0.1cm3 & can measure from 0.1 - 100cm3 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.
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THE 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.
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PREPARATION PICTURES
Nutrient agar in petri dishes Petri dishes put in ziploc and numbered
Mixing the materials together Heating the mixture to required temperature
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DAY 1 9/12
No difference
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DAY 2 10/12
No difference
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DAY 3 11/12
Piano keys: nothing Door knobs: nothing Dining table: bacteria growth starts Hand phone: nothing Computer keyboard: nothing TV button: nothing
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DAY 3 PICTURESPetri dish no. 3
Overall pictures of petri dishes
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DAY 4 12/12
Piano keys: growth starts -1st
Door knobs: growth starts -3rd Dining table: bacteria growth continues -2nd Hand phone: nothing -6th Computer keyboard: a bit of bacteria growth
noticeable - TV button: a bit of bacteria growth noticeable
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DAY 4 PICTURES
Overall shot of the Petri dishes
Petri dish 1 Petri dish 2 Petri dish 3
Petri dish 4 Petri dish 5 Petri dish 6
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DAY 5 13/12
Piano keys: most amount of bacteria growth -1st
Door knobs: 4th Dining table: 2nd Hand phone: growth starts -6th Computer keyboard: 5th TV button: 3rd
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DAY 5 PICTURES
Petri dish 1 Petri dish 2 Petri dish 3
Petri dish 4 Petri dish 5 Petri dish 6
Petri dish overall shot
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DAY 6 14/12
Piano keys: most amount of bacteria growth -1st
Door knobs: least amount of bacteria growth noticeable -6th
Dining table: -3rd Hand phone: -4th Computer keyboard: -5th TV button: -2nd
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DAY 6 PICTURES
Petri dish 1 Petri dish 2 Petri dish 3
Petri dish 4 Petri dish 5 Petri dish 6
Petri dish overall
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DAY 7 15/12
Piano keys: nothing Door knobs: nothing Dining table: bacteria growth starts Hand phone: nothing Computer keyboard: nothing TV button: nothing
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DAY 7 PICTURES