INTRODUCTION
As a fun introduction to the unit, students played the "what am I used for game". It was their job to come up with hypotheses for the use of the 7 objects at the tables. Most of the items were rather obscure, but several groups did manage to predict several of the objects uses.
Here is our introduction PPT
As a fun introduction to the unit, students played the "what am I used for game". It was their job to come up with hypotheses for the use of the 7 objects at the tables. Most of the items were rather obscure, but several groups did manage to predict several of the objects uses.
Here is our introduction PPT
Intro CSI PPT.pptx | |
File Size: | 231 kb |
File Type: | pptx |
FINGERPRINTS
The first thing we learned in this unit apart from hypotheses was fingerprinting.
Students learned 4 main types: Loop, Whorl, Arch, Composite
In addition we compared our classes results to the worlds averages and created a bar graph representing our averages.
Students also had the opportunity to fingerprint themselves using ink pads, as well as dusting for fingerprints on mirrors, glass and windows.
Students learned 4 main types: Loop, Whorl, Arch, Composite
In addition we compared our classes results to the worlds averages and created a bar graph representing our averages.
Students also had the opportunity to fingerprint themselves using ink pads, as well as dusting for fingerprints on mirrors, glass and windows.
Fingerprints PPT.pptx | |
File Size: | 1541 kb |
File Type: | pptx |
FOOTPRINTS and SHOE PRINTS
As a class we discussed the uniqueness that shoe prints can have. We looked at our own tread patterns and played a matching game to test our ability.
We also took at look at the differences in footprints; walking, running, jumping etc. We went outside to look at a variety of prints in the snow. We looked at tire tracks, animal tracks, running and walking tracks and differences between sizes of shoes.
As a class we discussed the uniqueness that shoe prints can have. We looked at our own tread patterns and played a matching game to test our ability.
We also took at look at the differences in footprints; walking, running, jumping etc. We went outside to look at a variety of prints in the snow. We looked at tire tracks, animal tracks, running and walking tracks and differences between sizes of shoes.
Footprints and Shoe Prints PPT.pptx | |
File Size: | 1697 kb |
File Type: | pptx |
HANDWRITING ANALYSIS
Students participated in a fun activity where they had to identify key evidence in another students work (that student attempted to alter their work from what they would normally do). Students then had to use their detective skills and notes they took to identify the person original work. Students did an excellent job identifying work!
Once we learned all about analyzing work, students had the opportunity to write their signature and a variety of other students attempted to forge their work. Many student's had unique writing and were rather happy that no one did a good job, others were concerned as some students did a fabulous job forging...
Below is the PPT and a few pictures from the awesome work!
Students participated in a fun activity where they had to identify key evidence in another students work (that student attempted to alter their work from what they would normally do). Students then had to use their detective skills and notes they took to identify the person original work. Students did an excellent job identifying work!
Once we learned all about analyzing work, students had the opportunity to write their signature and a variety of other students attempted to forge their work. Many student's had unique writing and were rather happy that no one did a good job, others were concerned as some students did a fabulous job forging...
Below is the PPT and a few pictures from the awesome work!
Handwriting Analysis and Forgery.pptx | |
File Size: | 2965 kb |
File Type: | pptx |
CHROMATOGRAPHY
Students used their knowledge from our trees and forest unit to help them with the chromatography of ink. Students discovered that you can indeed find out what marker/pen was used to write a mysterious note.
Chromatography of inks.docx | |
File Size: | 23 kb |
File Type: | docx |
SOIL ANALYSIS
Students used their detective skills to determine where a particular sample of soil may have come from. They used their observation and inference skills to assist in this.
Students used their detective skills to determine where a particular sample of soil may have come from. They used their observation and inference skills to assist in this.
Soil Sampling.docx | |
File Size: | 35 kb |
File Type: | docx |
FABRIC ANALYSIS
Our third lab of the week was to test a variety of fabrics, in a hope to gain an understanding of the techniques used by scientists to test fabrics that could have potentially been left at a crime scene.
Students then had to use their detective skills to infer what type of fabric a given mystery material was.
Our third lab of the week was to test a variety of fabrics, in a hope to gain an understanding of the techniques used by scientists to test fabrics that could have potentially been left at a crime scene.
Students then had to use their detective skills to infer what type of fabric a given mystery material was.
Fabric Testing.docx | |
File Size: | 30 kb |
File Type: | docx |
POWDER ANALYSIS
When determining the identity of an unknown substance, crime lab experts must use testing procedures that give results that clearly distinguish one material from another. Forensic chemists often perform more than one positive test on an unknown substance.
Students had to do a variety of tests on several white powders, they then had to use their observations to identify an unknown mystery powder.
When determining the identity of an unknown substance, crime lab experts must use testing procedures that give results that clearly distinguish one material from another. Forensic chemists often perform more than one positive test on an unknown substance.
Students had to do a variety of tests on several white powders, they then had to use their observations to identify an unknown mystery powder.
powder_testing.docx | |
File Size: | 21 kb |
File Type: | docx |
SOLUTION ANALYSIS: Cabbage juice indicator
When determining the identity of an unknown substance, crime lab experts must use testing procedures that give results that clearly distinguish one material from another. Forensic chemists often perform pH testing to determine the acidity of an unknown substance. The lower the number the more acidic a solution is and the higher the number the more basic so pH of 1 is very acidic and pH of 14 is very basic. pH values close to 7 are considered to be neutral. Pure water is neutral with a pH of 7.
In this lab we tested a variety of solutions to determine their pH based on the cabbage juice as the indicator. Students then had to identify 3 unknown solutions and determine their pH.
When determining the identity of an unknown substance, crime lab experts must use testing procedures that give results that clearly distinguish one material from another. Forensic chemists often perform pH testing to determine the acidity of an unknown substance. The lower the number the more acidic a solution is and the higher the number the more basic so pH of 1 is very acidic and pH of 14 is very basic. pH values close to 7 are considered to be neutral. Pure water is neutral with a pH of 7.
In this lab we tested a variety of solutions to determine their pH based on the cabbage juice as the indicator. Students then had to identify 3 unknown solutions and determine their pH.
red_cabbage_testing_-_ph.docx | |
File Size: | 160 kb |
File Type: | docx |
STRAWBERRY DNA EXTRACTION
All living things have DNA: the chemical instructions on how to make a living thing. It can easily be seen with the naked eye when collected from thousands of cells.
In this lab we broke apart the cell membrane of a strawberry and separate the DNA from the nucleus. Strawberries are a good source of DNA because they have 8 copies of each type of chromosome. This large number of chromosomes filtered out of the students solution so they could actually see the DNA.
All living things have DNA: the chemical instructions on how to make a living thing. It can easily be seen with the naked eye when collected from thousands of cells.
In this lab we broke apart the cell membrane of a strawberry and separate the DNA from the nucleus. Strawberries are a good source of DNA because they have 8 copies of each type of chromosome. This large number of chromosomes filtered out of the students solution so they could actually see the DNA.
strawberry_dna_extraction_experiment.docx | |
File Size: | 146 kb |
File Type: | docx |