Stephanie



List of Materials and Sketch of the Setup: -Four culture dishes with agar -Microscope -Water (culture dish 1) -Bleach (culture dish 2) -Windows cleanser (cultural dish 3) -Soap (cultural dish 4)



Procedure/Method: First, prepare two culture dishes and put some bacteria in each culture dishes. Next, prepare an exterminator and spray some on the bacteria of dish 1. And let dish 2 to stay constant. Then, observe the bacteria without exterminator and draw the image down. And observe the bacteria with materials that I mentioned, draw the image down and see the differences between the bacteria which have exterminator and bacteria which don’t have exterminator, bleach, detergent and other cleaning materials on four different culture dishes. We would observe what are the differences between them.

Planning an Experiment—Biology Trimester Investigation Plan due on Friday, April 27th

EACH STUDENT IS RESPONSIBLE FOR WRITING UP A CLEAR PLAN FOR YOUR INVESTIGATION, EVEN IF YOU ARE WORKING IN A GROUP.

Question(s) for investigation: Can exterminator kill bacteria? What will happen to bacteria if we spray some exterminator on them?

Independent variable and how it will be measured: Exterminator: measure how many times do you spray.

Dependent variable(s) and how it (they) will be measured: Bacteria: observe what would happen to bacteria colony after spraying the exterminator.

Variables held constant: The four culture dishes that we would use to put the bacteria. Same bacteria

List of Materials and Sketch of the Setup: -Two culture dishes with covers -Two bacteria -Exterminator -Microscopes

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? Sarah is going to work on this Biology investigation with me and she will be responsible to bring the exterminator. And we will ask the teacher try to find some culture dishes and bacteria that we used last time.

Procedure/Method: First, prepare two culture dishes and put some bacteria in each culture dishes. Next, prepare an exterminator and spray some on the bacteria of dish 1. And let dish 2 to stay constant. Then, observe the bacteria without exterminator and draw the image down. And observe the bacteria with exterminator, draw the image down and see the differences between the bacteria which have exterminator and bacteria which don’t have exterminator. We would spray the exterminator once each time and we will spray for about 10 times.

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?


 * Different cultural dishes ||
 * The reactions of the bacteria ||
 * 1 ||
 * 2 ||
 * 3 ||
 * 4 ||
 * 2 ||
 * 3 ||
 * 4 ||
 * 3 ||
 * 4 ||
 * 4 ||
 * 4 ||

Maybe we can make a sketch of what would happen after spraying exterminator on those bacteria

Expectations: · What do you think might happen and why? I think the bacteria will die and change color because exterminators are use to kill insects or mice.

· What other results do you imagine might happen and what would they mean? The other results are there will not change anything because bacteria don’t really related to exterminators, and they will not have any big reactions or response.

Communication: I will first discuss with her the details of the plan and our own jobs, like who is going to bring which material, who is going to do the experiment and who is going to observe the bacteria under the microscope, and who is going to write and draw down those records.
 * How will you plan to communicate your work clearly to others?

I hope we can at least discuss and know our duty and jobs to bring those materials and list a detailed procedure and plan for our first period. I think we may find some bacteria to observe. For the second period, I think we are going to observe and record down the image of bacteria. And we would spray some exterminator in the bacteria and observe what would happen. And the last period, we will record down the images of bacteria after being sprayed by some exterminator, and we would discuss the results and observe the bacteria of both dishes again.
 * What do you expect to accomplish in EACH of the next three class periods in which you can work on this investigation?