CSI

__Thursday 9 June__

HOW TO SOLVE A CRIME

When a there is a crime the Scene of the Crime offices can’t come until they are called by a witness from the scene of the crime. When they arrive in their cop car they will talk to the witness and the witness will explain what they think what could of happened. The Scene Of the Crime offices will walk through the scene of the crime with their hands in their pockets and some times with metal plates of their feet to making sure they don’t touch any think. The Scene of the crime offices will start to think what mite have happened. the overdoes they mite find are fingerprints, strands of hair, blood samples and other physical evidence.

They get fingerprints by getting a plastic square that have other plastic square and they put it on the fingerprint for about a minuet and the they put the other plastic pice on top. Then the Scene of the crime offices get strands of hair get get some tweezers and put the hair strand on the glass and then put water on it and seal it.

The Scene Of the Crime (SOC) is a unit in the NewZealand police force. They are the people who specialise in finding evidence and seeing what could of happened. They are the people who give the evidence to the next people to solve the evidence and the crimes.

Once the SOC officers are done with the evidence they will begin questioning witnesses. While one officer goes through the crime scene one last time another officer will takes notes of what they have found and what the possible scenario is. The police will then contact the witness’s and tell them what they believe that has happened. They will then ask them who might they think could of committed the crime.

After interviewing the main suspects they will match up the evidence with the suspects. The scene of the crime officers will then match up the suspects with the witness information and check the suspects alibis. When the scene of the crime officers will decide how did the crime.

__ Tuesday 7 June __

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Learning Intentions:

 1. To become familiar with //chromatography// and be able to apply it to 'real life'  situations.

 2. To perform 'fair tests' in Science identifying substances and fibres.

 3. Identify and group fingerprintsinto 3 main categories: Arch, Loop  and Whorl.

 4. Set up and carry out Scientific Experiments following the correct process  of; Aim, Equipment, Hypothesis, Method, Results and Conclusion.

 5. Work collaboratively with peers to solve problems using the skills learnt.

__Lesson Three - Kitchen Chaos Wednesday 11 May 2011:__

 The kitchen cupboard has got very damp and the labels have fallen off some  of the containers. From the label scraps it is found that there is:

 Icing sugar  baking soda  salt  cream of tartar  cornflour

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> TASK - Make order out of chaos

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Use a series of simple tests and good observations to find out what substance is in <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> each container.

<span style="color: #009f00; font: normal normal normal 26px/normal Chalkboard; margin: 0px;">Caution: You are not allowed to taste them! Please use small quantities.

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Aim: to find out what the substance is by carrying out a series of simple tests.

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Hypothesis: <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> I think that the substance in the different containers is;

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Substance A - ............................. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Substance B - ............................. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Substance C - ............................. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Substance D - ............................. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Substance E - .............................

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Equipment - Five containers with the different substances labelled A, B, C, D, E. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> - Eyedroppers <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> - Vinegar <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> - Magnifying Glass <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> - Litmus Paper (red and blue) <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> - Iodine

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> CLUES TO HELP YOU.......................

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 1. Cream of tartar is an acid, and turns blue litmus paper red. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 2. Cornflour and sugar are neutral and don't affect litmus paper. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 3. Salt and bicarbonate of soda are alkaline, that is they turn red litmus paper blue <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 4. Bicarbonate of soda fizzes when mixed with vinegar. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 5. Iodine changes from yellow-brown to blue-black with cornflour. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> There are many different ways of telling the differences between substances. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> You could:


 * Smell them carefully.
 * Compare the way they dissolve in water.
 * Examine with a magnifying glass.
 * Test the acidity with litmus paper.
 * Test the reaction with vinegar and iodine.

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Results: <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Substance A is .......................... Substance B is ........................ <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Substance C is .......................... Substance D is .......................... <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Substance E is ..........................

<span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;">Lesson Four - Finger Prints __Wednesday 18 May 2011__:

<span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> Every person's fingerprint are as different as each person. The use <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> of fingerprints is very important for the police whose only evidence at <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> a robbery might be the fingerprints left by the thief. Police keep a <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> record of fingerprints of criminals in banks of computers.

<span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> Different types of Prints

<span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> <span style="font: normal normal normal 26px/normal Chalkboard; line-height: 0px; margin: 0px; overflow-x: hidden; overflow-y: hidden;"> <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> Loop Whorl Arch

<span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 28px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> __Your Fingerprints__

<span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> Equipment - Pencil, Paper, Sticky tape, Magnifying glass.

<span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> Method <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> 1. Rub the side of a pencil lead back and forth on a sheet of paper to build <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> up the black area large enough to take 10 prints. <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> 2. Press one of your fingertips firmly onto the black. Place the sticky side of a <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> piece of tape over your fingertip. (You may need a friend to help you with this.) <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> 3. Tape the print to the correct location on the fingerprint form. <span style="font-family: arial,helvetica,sans-serif; font-size: 13px; font: normal normal normal 26px/normal Chalkboard; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"><span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 4. Using the magnifying glass compare your prints to the pictures above and try to label them as either arches, loops or whorls.

<span style="font-family: Chalkboard; font-size: 26px; font: normal normal normal 26px/normal Chalkboard; line-height: normal; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;">All my finger prints are all loops.

<span style="font: normal normal normal 26px/normal Chalkboard; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;">__Lesson 5 - Hair Analysis Friday 20 May 2011:__

<span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;">Learning Intention: We are learning to

<span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> 1. think about the process involved in developing a technique for forensic analysis

<span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> 2. identify the physical structures of hair

<span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> 3. use our observational skills, critical thinking and microscopy

<span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> Background information <span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> Unfortunately hair is not the best type of physical evidence for establishing identity. It is not possible to show with any certainty that two hairs came from the same person or animal. However hair can be used to rule out certain suspects or scenarios. It can also be used to corroborate (support) other physical evidence if it is consistent with the rest of the evidence.

<span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> Guide to Identification

<span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;"> Cuticle - Outer coating composed of overlapping scales <span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; min-height: 32px;"> <span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;">Medulla - Central core, this may be absent <span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; min-height: 32px;"> <span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;">Cortex - Protein rich structure surrounding the medulla; contains pigment <span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; min-height: 32px;">

<span style="font: normal normal normal 28px/normal Arial; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; min-height: 32px;"> Fill in the Identification Chart