Sarah

^ use the one on top ll

biology trimester investigation: draft Plan due on Monday, April 9th

Question for investigation: What will happen when soap, window cleanser, bleach, water are sprayed on bacteria?

Independent variable and how it will be measured: Different chemical fluids; measured by ml using beakers with scale

Dependent variable and how it will be measured: Changes in bacteria colony; size, color, whether it stopped to grow or not; take photo

Variables held constant: Quantity of the chemical fluids sprayed on bacteria. Same type of bacteria (found from same place)

List of Materials and Sketch of the Setup: Bacteria from the laptop touchpad, 4 culture dish, water, soap, bleach, window cleanser, cotton swab, laptop, camera, spoon.

Who else will work on this investigation? Who will be responsible for collecting materials to get started and when will all materials be ready to begin?

Stephanie will work with me and she will bring bleach and camera and I am responsible to bring soap and window cleanser; I think we could get started on may 7th

Procedure/Method: 1, prepare four culture dishes then using cotton swab rub the touch pad of the laptop. 2, swab the cotton swab back on surface of the 4 culture dishes then cover the lids of the culture dishes. 3, leave the culture dishes for a week in same place. 4, after a week, take each photo of the bacteria on 4 culture dishes. 5, weigh the window cleanser, bleach, soap and water to make them same in quantity 6, after that, put the soap, bleach, window cleanser and water on each culture dishes. 7, few days later, take the photo of the bleached bacteria, bacteria with soap; bacteria with window cleanser and bacteria with water 8, record the changes.

Data:
 * Make a blank data table which you plan to fill out during the investigation
 * What other data do you expect to include in a report of your results?


 * materials/changes in bacteria colony ||
 * color ||
 * size ||
 * growth ||
 * soap ||
 * window cleanser ||
 * bleach ||
 * water ||
 * window cleanser ||
 * bleach ||
 * water ||
 * bleach ||
 * water ||
 * bleach ||
 * water ||
 * bleach ||
 * water ||
 * water ||
 * water ||
 * water ||
 * water ||

Expectations:

Bacteria would be affected in any way and I think the bacteria with window cleanser will stop growing because window cleanser is for sanitary use so I think window cleanser would contain anti-bacterial substance Nothing might happen to the bacteria in 4 culture dish except growing and that would mean none of the chemical fluid contains anti-bacterial substance.

Communication: I will show the photos of the changes in bacteria and write the procedure clearly so that everyone could understand;;. I believe that I could spray the chemical fluids on culture dish on may 7th and see the changes on may 9th.

Appendix 1:scientific terminology


 * Antibiotics:** a substance, such as penicillin or streptomycin, produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms. Antibiotics are widely used in the prevention and treatment of infectious diseases.

sentence: bleach is one of the chemical fluids that we used for experiment
 * Bleach**: A chemical agent used for removing colour from fabric.

sentence: both antibacterial soap and normal soap could get rid of bacteria.
 * Soap**: A cleansing agent, manufactured in bars, granules, flakes, or liquid form, made from a mixture of the sodium salts of various fatty acids of natural oils and fats.

sentence: we will record the changes that might occur to bacteria and mold when chemical fluids are added in.
 * bacteria**: domain of unicellular prokaryotes that have cell walls containing peptidoglycan.
 * Mold**: a conspicuous mass of [|mycelium] and fruiting structures produced by various fungi (division Mycota; //see// [|fungus]). Molds of the genera //Aspergillus//, //Penicillium//, and //Rhizopus// are associated with food spoilage and plant diseases, but some have beneficial uses, as in the manufacture of [|antibiotics] (e.g., [|penicillin]) and certain cheeses. //Neurospora//, or orange bread mold, has been invaluable in the study of biochemical genetics. Water molds live in fresh or brackish water or wet soils, absorbing dead or decaying organic matter. //See also// [|slime mold].

sentence: culture dish is used to grow our bacteria for the experiment.
 * Culture dish:** A shallow circular dish with a loose-fitting cover, used to culture bacteria or other microorganisms.

Appendix II: BIG ideas


 * Antibiotic**: A substance, such as penicillin or streptomycin, produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms. Antibiotics are widely used in the prevention and treatment of infectious diseases.