Science experiment ----------------------------------
description
Transcript of Science experiment ----------------------------------
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 -4th or 5th TV button: a bit of bacteria growth noticeable
-4th or 5th
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: most amount of bacteria growth -
1st Door knobs: -4th Dining table: bacteria growth starts -5th Hand phone: bacteria growth is the least -6th Computer keyboard: -3rd TV button: -2nd
DAY 7 PICTURESPetri dish 1 Petri dish 2 Petri dish 3
Petri dish 4 Petri dish 5 Petri dish 6
~THE PREDICTED RESULTS~ ~THE RESULTS~
1st -Computer keyboard| 1st -The piano 2nd - door knobs | 2nd - TV button 3rd -hand phone | 3rd - computer keyboard 4th - TV button | 4th - door knob 5th - dining table | 5th - dining table 6th - piano | 6th – hand phone
TABLE WITH RESULTS TABULATEDDay 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7
Pianokeys
- - - 1st 1st 1st 1st
Door knobs
- - - 3rd 4th 6th 4th
Dining table
- - GrowthStarts
2nd 2nd 3rd 5th
Hand phone
- - - 6th no growth!
6th 4th 6th
PC keys
- - - 4th / 5th 5th 5th 3rd
TV button
- - - 4th / 5th 3rd 2nd 2nd
Key: - means same