Kayla+CSI

toc =__CSI Milford__=

=Day 1 Report:=

Observations
Someone took Mrs.Laguna's penguin and left a ransom note (picture below). We now are trying are figure it out by collecting pens from all the teachers involved (listed below)

Background Information
technique for separating and identify mixtures that are colored or can be colored especially pigments. Can be used in secondary or primary colors in ink experiments. This method has been replaced by thin layer chromatography. http://en.wikipedia.org/wiki/Paper_chromatography

Mixtures-a substance made by mixing other substances together solution-a liquid mixture in which the minor solute is distributed within the major component paper chromatography- technique for separating and identify mixtures that are colored or can be colored especially pigments fractional distillation-separation of a liquid mixture into fractions differing in boiling points teachers-Cravener, Hood,Bile,Kirstman,Laguna,Rodes,Lancos

Inferences or Hypothesis
The person doing it is Mr.lancos

Tests Performed
none

Data
We collected black pens from the teachers, Mr.Hood had evidence on his computer, Mr.Bile had evidence in his room with the sign and penguin crossed out. Mrs.Cravener acted clueless about the whole idea.

Conclusions
Mr.Hood had evidence on his computer, Mr.Bile had evidence in his room with the sign and penguin crossed out. Mrs.Cravener acted clueless about the whole idea.

=Day 2 Report:=

Observations
Only the rubbing alcohol is touching the paper below the dot from the ink. The ink is spreading apart and no longer is a little dot. Mrs.Kirstmans pen is not spreading and there is no ink turning blue which means it is not a solution because its not separating into different colors. The ink spreads into different colors like blue, purple, and teal. Cravener has brown out of her pen.

Background Information
Mr.Lancos-Ink is turning blue meaning its a solution because two different inks were mixed together to make one

Inferences or Hypothesis
As soon as we test the paper/note it was written on we hopefully will be able to look at the other strips of chromography paper and match the relations.

Tests Performed
paper chromatography

Data
Every pen bled out different colors (picture below) each color means that the pens are not only made of black ink and that's shown by the colors that formed when put in rubbing alcohol, unlike Mrs.Kirtsmans who's pen did not bleed out at all, it stayed the same black little dot.

Conclusions- every marker/pen had a different reaction to the rubbing alcohol. Some had different colors that were blended together, like blue, purple and brown.
=Day 3 Report:=

Observations
First we found the mass of the empty graduated cylinder, then the mass of the graduated cylinder with 10mL of the mystery substance inside.

Background Information
We do not know the substance in the graduated cylinder.

Inferences or Hypothesis
The masses will be close to each other.

Tests Performed
density

Data
Mass of empty graduated cylinder- 17.2g Mass of graduated cylinder and liquid together- 26.4 Mass subtracted from cylinder- 9.2 D=M/V- 0.92 g/mL

Conclusions
The final density was 0.92 g/mL =Day 4 Report:=

Observations
We found a note in Mrs.Craveners room with the same paper as the ransom note was written on. There was also a black pen sitting right under the note on the chalk ledge. Some also thought it was Mr.Hovan because his paper looked the same, but after putting them next to each other they were very different. Mrs.Cravners note and ransom note both have similar handwriting.

Background Information
Mrs.Cravner acted clueless about her note on her board, but let the class take it.

Inferences or Hypothesis
It will be Cravener since the note is so similar and she acted clueless

Tests Performed
Heating curve

Data
The test was done twice to test Mrs.Cravners pen and note she had in her room, the note and ransom not look very very similar with the same colors on the strips of paper. We made a graph of the heating curve (saved in Downloads)

Pictures




Conclusions
We are pretty sure it was Mrs.Cravener because the very close results of the pens.

=Day 5 Report:=

Observations
each wood splint gets dipped in the substance only at the top of the wood splint you carefully hold the wood splint over top of the match

Background Information
the wood splint gets held over the match (fire) and then its reaction tells whether its flammable or not, because it will also get lit on fire if its flammable if it does not it is not flammable.

Inferences or Hypothesis
they will all turn out with the same results

Tests Performed
flammability test

Data
substance A-flammable substance B- not flammable substance C- not flammable

Conclusions
substance A was the only one flammable