Michelle+CSI

= = =__CSI Milford__=

=Day 1 Report:=

Observations
__Beil__: Black to light green to blue. __Lancos__: Light pink/purple to dark green. __Rhodes__: Pink to dark green. __Laguna__: Stayed black the whole time, but drifted down. __Hood__: Black to green __Kirschman__: Didn't change __Cravener__: Black to pink/purple to dark green.

Background Information
Paper Chromatography: an analytical method technique for separating and identifying mixtures that are or can be coloured, especially pigments. Mixture: a material system made up of two or more different substances which are mixed but are not combined chemically.

Inferences or Hypothesis
We believe that they are all going to turn blue and/or purple.

Tests Performed
We are marking a black marker on the chromatography paper. These markers are from Beil, Lancos, Kirschman, Laguna, Cravener, Hood, and Rhodes.

Data
We tested 7 different black markers on chromatography paper and almost all of them had different results.

Conclusions
All markers that were not sharpies, were separated into different colors by the alcohol. Could Mrs. Kirschman be the killer? She's the only one with a marker that didn't separate into different colors so could that be a hint...?

=Day 2 Report:=

Observations
None of the chromatography papers tested matches the ransom note marker. The liquid from the beaker found by the barely living penguin was clear.

Background Information
I made an inference that the mystery liquid is nail polish remover because the several times that I have used nail polish remover, the smell is very familiar and smelled similar to the mystery liquid.

Inferences and Hypothesis
I believe that the mystery liquid could either be nail polish remover due to the smell.

Tests Performed
Mass of graduated cylinder: 17.5 g Mass of graduated cylinder and 10mL of liquid: 26.3 g Mass of graduated cylinder and liquid minus empty graduated cylinder: 8.8 g D=M/V > D=8.8/10 > D=0.88

Data
The density (D) of the mystery liquid was .88 grams (g). We found this by finding the mass of the graduated cylinder and then the mass of the graduated cylinder with the mystery liquid in it. With that we subtracted them from each other to find the mass of the liquid.

Conclusions
Mrs. Kirschman was definitely not the killer because her black marker didn't even run, so it doesn't match the ransom note marker. 1 out, 6 more to narrow down.

=Day 3 Report:=

Observations
Heating curve displayed that it was stuck at 79 degrees. It then started to heat again and leveled off again at 99 degrees. For the first 1 and a half minutes, the liquid stayed still and clear. At 2 minutes, bubbles appear. At 2.5 minutes, boiling begins. Between 3 and 3 1/2 minutes, the temperature increased rapidly from being at 40 degrees C at 2.5 minutes to 74 degrees C at 3 minutes. From 4 and 4 1/2 minutes, the temperature starts to settle. At 5.5 and 6 minutes, the temperature is increasing, but barely. At 6 minutes, the liquid is a murky yellow. From 6.5 minutes to 11.5 minutes, the liquid is boiling the whole time. At 12 minutes, the liquid in the first test tube is diminishing and the test tube in the ice water beaker is growing. Finally for the last 30 seconds of the experiment, the temperature stayed the same.

Background Information
We already know that water levels off at 99 degrees.

Inferences and Hypothesis
There were two solutions, the one that leveled off at 99 degrees is believed to be water, and the one that leveled off at 79 degrees is believed to be...

Test Performed
We heated the unknown liquid and measured the increase in temperature as the time increased as well.

Conclusions
I am almost positive Mrs. Cravener is the murderer, just look at the similarity her marker is the same to the killers marker! =Day 4 Report=

Observations
During this test, we observed many things. We started to see bubbles once we hit 2 minutes. This bubbling continued for another minute until we saw condensation in the beaker at 3.5 minutes. The ice in the beaker melted along the way and we soon saw rapid bubbling at 4.5 minutes. This lasted for another minute, and the temperature, very slowly, raised. It then stopped rising from minute 6 to minute 7. Once it started to rise again, we switched out our test tubes that were laying in the cold water bath. The temperature then just slowly raised from minute 7.5 to the rest of the test which lasted 26 minutes. We switched to our third beaker at 21.5 minutes.

Background Information
Fractional Distillation definition- The separation of a liquid mixture into fractions differing in boiling points by means of distillation.

Inferences and Hypothesis
I believe that there will be many plateaus in our graph due to so many of the same temperatures in a row.

Test Performed
Today we completed the Fractional Distillation test. We poured 15 mL of the liquid into a test tube, added 3 boiling chips and put in a rubber stopper with a temperature sensor attached. Put the end of the black tubing into an empty test tube in an ice water bath. We then heated the liquid and recorded observations and the temperature at 30 second intervals. Then we switched test tubes after it first hit a plateau. Then switched to our third test tube when the plateau started to increase in temperature.

Conclusions
Mr. Beil hasn't come to visit us in awhile, so I don't he can be the killer. How can he get the supplies when he doesn't come to visit! =Day 5 Report=

Observations
During our flammability test, we found that test tube A was the only one that was flammable. It was a very small, short flame, but it counted as being flammable. The liquids in test tubes B and C were not flammable, no flame was shown. For density, test tube A had the lightest; 0.74 g/mL. Could that have anything to do with the fact that the liquid in test tube A was also the only flammable one...?

Background Information
To find the density of an object, you use the formula, D=M/V.

Inferences and Hypothesis
I think test tube B will have the greatest density because it's the cloudiest so that may contribute to its density. On the other hand, trying to figure out what liquid will be flammable or not is hard to tell because you have no clues as to which it is flammable or not.

Test Performed
We performed the flammability and density test today. For the flammability test, we had 3 wood splints and we dipped one in each of our 3 test tubes that we used during the fractional distillation test. After we dipped them, we used a match and touched it to the wood splint to see if the liquids were flammable. For the density test we found the mass of an empty graduated cylinder, then the mass of 10mL of each liquid from each test tube using the triple beam balance. After that, we used the formula, D=M/V to find the density of each liquid.

Data
__Flammability:__ Test Tube A- Yes B- No C- No __Density:__ Test Tube A- 0.74 g/mL B- 0.89 g/mL C- 1.08 g/mL

Conclusions
It has to be Mrs. Cravener!

We finally cracked the code, Mrs. Cravener was the killer. I knew it from the moment we began the investigation. She tried to play it off, but she was always hiding a smile when we questioned her. She is a very sneaky and clever murderer. The way she used the same paper as the ransom note, yet wrote an innocent note to remind us about an assembly on Friday, throwing us off. However, her sneaky moves didn't trick me! Mrs. Cravener always seemed like the evil killer, considering she doesn't like kids...dun, dun, DUN!!
 * //__Whodunnit?__//**

(P.S. Mrs. Cravener, please don't take this seriously, you know I love you and I would never think of you as a crazy penguin killer!)