Growth of bacteria?
Out of one of these eight items which is cleaner?
By
Brandon Hour. Mrs.Devlin's 5th grade class. Science fair #291
Hypothesis
My hypothesis is the dinning table will be the cleanest because my dad usually cleans the dinning table most of the time. These are common objects in your house.
What's happening ?
How do this special plate allow us to see bacteria? Inside the plate is a special gel called nutrient agar that has the perfect surface and temperature to grow in and evenly grow so that a human can see the bacteria with the naked eye.
Surface/items
- 8 petri dishes
- cotton swabs with samples of surfaces
- log book
- smore
- dinning table
- my cousin's mouth
- desk
- fish bowl
- finger
- floor
- corner of my room
- Ipad
Forms of bacteria
Bacteria can take many shapes and forms. How exactly do we identify them. Well how we use their looks like a circle one or a rod one bacteria can take many forms. But they most like take these forms as shown in the picture. Also you can tell how nasty or dirty it is by it's color light colors like red,yellow,orange etc.... but not white because white is like the basic color for it.
Observation 1
Saturday 1/18/14: everything was still the same but, the fish bowl and the finger prints grow a little the fish bowl grew tons of dots and the finger prints grew one big dot.
Observation 2
Monday 1/20/14: everything else stared to grow and the finger print got bigger and the fish bowl started to turn yellow.
Observation 3
Saturday 1/3/14 all are fully grown found so fungus and mold. Mostly just black splat looking bacteria. Also yellow and white.
Conclusion
This experiment proves that bacteria is every where. Even in your houses. Also which is cleanest? well through all of the observation I found one that was less dirty as the others are which is. Surprisingly the corner of the room. Dirtiest your fingers so just wash your hands next time.