Hurumanu - Fingerprints

Forensic Science

Definition:

the application of scientific methods and techniques to matters under investigation by a court of law.

5 Forensic Science topics;

1. DNA 
2.  Fingerprints
3.  White Powder
4.  Ballistics
5. Fibers

    

Finger prints

Fingerprint characteristics

Aim: To look at the different types of fingerprints.

Materials: 

1.   Balloon
2.   Ink Pad
3.   Finer

Steps

1.   Roll your finger on the ink pad
2.   Press your finger onto the balloon
3.   Then blow the balloon up

Insert two pictures here of your fingerprints

Ink prints

Thumb print	Index finger print

Record the types of fingerprints from those in your group.

Name	Fingerprint 1 (Thumb)	Fingerprint 2 (index finger)
Makenzie H

Dusting fingerprints:

Lifting fingerprints

Aim: To learn how to lift hidden fingerprints from an object.

1. Lifting and Gathering fingerprints.

Equipment:

1.   
2.   
3.   
4.   
5.   
6.  

Method: 

1. 
   
2.   
3.   
4.  
5.  
6. 
   

Results:

Lifted fingerprints

Thumb print	Index finger print

Conclusion :

Aim: To learn about a saturated solution and how to make crystals

Crystal video

Definition of solution: A liquid mixture, when something is dissolved into a liquid (eg: sugar in water)


Definition of saturated: Having or holding as much as can be absorbed of something (when no more sugar or borax can be dissolved into the water)

In groups of three you will make three different types of crystals and compare the results.

Borax Crystals

Borax Crystals time lapse video

Ratio; 3 Tablespoons Borax per 1/2 cup water

Materials

1) Cup

2) Stirring Stick

3) Borax 

4) Water (WARM)
5) Pipe Cleaners

6) Peg

Process

Step 1: Pour Cold Water into a cup - About halfway

Step 2: Then add 3 tablespoons of Borax

Step 3: Stir the borax until dissolved

Step 4: Then use the pipe cleaners and make it into a star 

Step 5: Connect it to the peg

Step 6: Crystals form.

Sugar Crystals

Sugar crystals video

Ratio: 1 cup sugar to 1/2 cup water

Materials

1) Cup

2) Water (WARM)

3) Sugar

4) Stirring Stick

5) String

Process

Step 1: Pour Warm water into the cup - About halfway

Step 2: Add 8 Tablespoons of Sugar

Step 3: Mix until sugar dissolves

Step 4: Tie a string to your stick 

Step 5: Put the string into your cup

Step 6: Watch it crystallize

Salt Crystals

Salt crystals time lapse video

Ratio: 4 Tablespoons salt to 1/2 cup water

Materials

1) Water (COLD)

2) Salt

3) Stirring Stick

4) String

5) Cup

Process

Step 1: Pour cold water into the cup - About halfway

Step 2: Add 4 tablespoons of salt.

Step 3: Mix salt until dissolved.

Step 4: Tie a string to your stick 

Step 5: Put the string into your cup

Step 6: Watch it crystallize

Findings

Describe your crystals in the table below.

Crystal Type	Shape (Describe the shape)	Size (of individual crystals)	Hardness (Crumbly to Rock Hard)
Borax	Star	Large	Hard
Sugar	Straight	Small	Hard
Salt	Cube	Medium	Hard

What crystals worked out best and why?:

Conclusion:

________________________________________________________________________

After watching the videos as a class, explain how the following crystals are formed:

Type	Explanation
Salt	Salt is formed by the evaporation of salt water. It's produced by shallow ponds dry up in the sun and the large salt crystals are left behind.
Sugar	Raw sugar is from sugar cane or sugar beet. Then made into sugar syrup, then the sugar syrup is boiled, then cooled out and crystallize into sugar.
Snowflakes	Snowflake begins to form when an extremely cold water droplet freezes onto a dust particle in the sky. It creates an ice crystal.

CRYSTAL TYPES

AIM: TO LOOK AT THE 7 DIFFERENT TYPES OF CRYSTALS

Salt Crystals

Sugar Crystals

Borax Crystals

7 different crystal shapes

The 7 types of crystals

Type	Number of sides	2 examples	Image
Trigonal	7	Turquoise Rhodonite
Monoclinic	4	Azurite
Orthombic	4	Tanzanite
Triclinic	4	Amazonite
Hexagonal	6	Emerald
Isometric	6	Fluroite
Tetragonal	4	Wulfenite