science experiment ----------------------------------
DESCRIPTION
Science experiment ----------------------------------. Bacteria growth in the various parts of the house. 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 - PowerPoint PPT PresentationTRANSCRIPT
SCIENCE EXPERIMENT----------------------------------Bacteria growth in the various parts of the house
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.
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.
PREPARATION PICTURES
Nutrient agar in petri dishes Petri dishes put in ziploc and numbered
Mixing the materials together Heating the mixture to required temperature
DAY 1 9/12 No difference
DAY 2 10/12 No difference
DAY 3 11/12 Piano keys: nothing Door knobs: nothing Dining table: bacteria growth starts Hand phone: nothing Computer keyboard: nothing TV button: nothing
DAY 3 PICTURESPetri dish no. 3
Overall pictures of petri dishes
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
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
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
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
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
DAY 6 PICTURES
Petri dish 1 Petri dish 2 Petri dish 3
Petri dish 4 Petri dish 5 Petri dish 6
Petri dish overall
DAY 7 15/12 Piano keys: nothing Door knobs: nothing Dining table: bacteria growth starts Hand phone: nothing Computer keyboard: nothing TV button: nothing
DAY 7 PICTURES