Crime Busters Practice test 2010

Dr. J Smith returned from a trip to the office to find her lab in shambles. She only left the room for a couple of minutes while filling the vials for a chemistry lab test scheduled for the next day, so she had not bothered to lock the door. Dr. Smith heard a noise outside and rushed to the window in time to see someone pedaling off furiously. Unfortunately the person was trying to get away so fast that the bike wheel slipped off the pavement sending the bike and its rider flying. Police found a bike track, footprint, and blood on the sidewalk. In addition to the dumped chemistry test materials, the police also found a sample bottle containing water and a note indicating the vandalism was in retaliation for Dr. Smith’s investigative work on water quality at Lemon Lake. That narrowed the suspects since Dr. Smith only had two students whose parents worked at industries on Lemon Lake.

You will need to identify the dumped Crime Buster materials, identify the problem at Lemon Lake and determine from the evidence which of the suspects perpetrated the crime.

Attach your chromatograms to the answer sheet

SUSPECT INTERVIEW SHEET

NAME Bobby Robertson GRADE  7th HAIR Brown FAVORITE DRINK grape HOBBIES  Stamp collecting PEN  Vis a visChores  Taking the trash out, snow shoveling, cleaning the toilet  EYES  blue CLOTHING  Jeans and cotton sweatshirtPARENT WORKS at school, dad is the Principal and mom the school nurse  INTERVIEW STATEMENT My dad said he will take away my cell phone if I fail another chemistry test

 

CHEMISTRY TEST CHEMICALS on Bobby  NaCl, calcium carbonate, tinFINGERPRINTS DNA

 SHOE BOTTOM TIRE

 

SUSPECT INTERVIEW SHEET

NAME Patsy Potter GRADE  8th HAIR Black FAVORITE DRINK tropical punch

  HOBBIES  Baking and sewing

PEN  pentel

Chores Weeding and tending the garden, doing dishes 

EYES  green CLOTHING Fleece sweats and nylon socks

PARENT WORKS at Power plant near Lemon Lake (pH issues)  INTERVIEW STATEMENT chemistry is cool – I really want to get an A on the lab test.  CHEMISTRY TEST CHEMICALS on Patsy gypsum, sodium acetateFINGERPRINTS DNA

 SHOE BOTTOM

 

 

 

 

 

TIRE

SUSPECT INTERVIEW SHEET

NAME Justin Case GRADE  6th HAIR Blond FAVORITE DRINK ice blue raspberry lemonade

  HOBBIES  home science experiments

PEN  crayola

Chores  Feeding the pigs, stacking the fertilizer in the barnEYES  green CLOTHING Overalls & t-shirtPARENT WORKs on family farm by Lemon lake (nitrates)  INTERVIEW STATEMENT school is a waste of time – I can’t wait to get a job and earn money to buy my girlfriend a ring

 

CHEMISTRY TEST CHEMICALS on Justin alka- seltzer, alcoholFINGERPRINTS DNA

   TIRE SHOE BOTTOM

  

 

 

SUSPECT INTERVIEW SHEET

NAME Maise Miller GRADE 8th   HAIR auburnFAVORITE DRINK cherry HOBBIES  Knitting and

readingPEN  sharpie

chores  noneEYES  blue CLOTHING Polyester lacy top and leggingsPARENT WORKS  They are owners of the metal refinery near lake lemon INTERVIEW STATEMENT

 School is so much fun and the work is so easy

CHEMISTRY TEST CHEMICALS on Maise noneFINGERPRINTS DNA

 

TIRE SHOE BOTTOM

 

Vial

Type Name Implicates

1 Metal

2 Liquid

3 Powder

4 powder

5 liquid

6 Mixed powder

7 powder

8 Mixed powder

9 metal

10 Mixed Powder

Heavy Metal pH DO Turbidity11 Lake Sample 1 From

inlet

12 Lake Sample 2 From

outlet

Fingerprint Fingerprint type

Ink Chromatogram

Juice Chromatogram

DNA

Foot Print

Tire Track

Blood Spatter-angle?

Height?

Write a short answer on the back to explain which or the suspects, if any, you think committed the crime.

EVIDENCE SHEET

Fingerprint from lab door Footprint from sidewalk

DNA from blood sample on sidewalk

Tire Track from Side Walk

Blood drop from sidewalk

The lake water samples were sent to a lab to have their copper levels measured: