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Dish Soap vs. Yeast Cells

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briana copeland

on 20 May 2015

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Transcript of Dish Soap vs. Yeast Cells

Dish Soap is a liquid so it is easily mixed with the yeast
Reason 3
Soap is a household item that has many unknown uses.
Reason 2
Soap is acidic, we were curious on how it would effect the yeast
Reason 1
Problem Statement
Why the order?
Because it is the order of the scientific process
Dish Soap
Lactic Acid
SD 3A Alcohol
Sodiumlaureth sulfate
These all contribute to cleaning but also killing germs

Kills weeds
Green lawn

Yeast Cells
Dish Soap

Background Info
Dish Soap vs. Yeast Cells
We are testing what effects dish soap has on yeast cell reproduction in two weeks, when dish soap is mixed with yeast in its natural state.
Hypothesis Statement
Independent Variable
Dependent Variable

Data Collected
Digital Scale-weighed our variable
Paper Towel-helped us put the sugar in
Spoon-held the dish soap and stirred
2000 ml beaker-had solution in
Graduated cylinder-measured water
Pipet-squirted solution onto hemocytometer
2 grams of yeast-how many yeast cells
1000 ml water-what the yeast cells are in
2 beakers-Our solution
Microscope-helped to count our cells
Slide-put solution on
Hemocytometer-Helped count the cells
cover slip- covered the solution
Ethanol gas
Yeast cells use sugars and starches to create energy and reproduce by budding.
1.Get beakers
2.Fill beakers with 45mL of water
3.Measure 2 grams of sugar
4.Pour sugar into beakers
5.Fill pipet with yeast solution
6.Put yeast in water
7.Weigh spoon
8.Put dish soap into spoon
9.Weigh spoon w/ dish soap in it and subtract spoon weight from total
10.Put soap solution into experiment solution and mix
11.Get microscope out
12.Put controlled solution on slide
13.Observe under microscope and count yeast cells
14.Record how many yeast cells are in a grid
15.Put experiment solution on slide and repeat steps 13&14
16. Clean up

To see the effects on yeast when dish soap is added. Will it grow or die off?
If we add dish soap to yeast cells, then yeast cell counts will reduce
Dish Soap
Yeast Cells
What will happen when dish soap is added to yeast cells?


We focused it in and then counted all of the yeast cells that were within the box and on the lines.
Adding dish soap to yeast cells will make them rise but then fall to almost nothing in five days.
We did not change anything in the experiment. Yes the data answered our questions, because it showed a decrease in cell life. Yes the procedures worked.Same pipets and counters, no spilling of the solution and using the same amount of solution on the slide all minimized errors.
Things that we could change for the next time would be the variable.
First we stated our problem: What would happen if we added dish soap to yeast cells?
Second we designed our study.
Then we searched for the information.
After that we created our hypothesis: If we add dish soap to yeast cells, then the amount of cells would go down.
Then we did our experiment.
Lastly we recorded our results and conclusions

"Yeast Cell Structure." Yeast Cells. N.p., n.d. Web. 18 May 2015.
"Dish Detergent | Gain." Dish Detergent | Gain. N.p., n.d. Web. 18 May 2015.
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