Finger Prints!

Forensic Science

Definition:

Forensic science is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal procedure.

5 Forensic Science topics;

1. FingerPrints 
2. D.N.A
3. White powder 
4. Ballistics 
5. Files 

    

Fingerprints

Fingerprint characteristics

Aim: To look at the different types of fingerprints.

Materials: 

1.   Balloon 
2.   Finger 
3.   Ink 

Steps

1.   Put your Thumb into the ink. 
2.   Press your thumb onto the balloon. 
3.   Blow up the balloon.
4.    Find out which type of fingerprint you have. 
5.   Do the same thing again with your index finger.

Insert two pictures here of your fingerprints

Ink prints

Thumbprint	Index fingerprint

Record the types of fingerprints from those in your group.

Name	Fingerprint 1 (Thumb)	Fingerprint 2 (index finger)
Lucy	Loop	Loop
Belle	Arch	Arch

Crystals

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)Borax 

2)Water 

3)String 

4)Plastic Cup 

5)pipe cleaners 

6)peg

Process

Step 1: Add Borax into the plastic cup

Step 2: Add hot water into the plastic cup

Step 3: Stir the water with the borax 

Step 4: Create a star with the pipe cleaners 

Step 5: Attach the star to a peg 

Step 6: Place the peg and the star in the cup 

Sugar Crystals

Sugar crystals video

Ratio: 1 cup sugar to 1/2 cup water

Materials

1)Sugar 

2)Water

3)String 

4)Plastic Cup 

5)Popsicle stick 

Process

Step 1: Add sugar into the plastic cup 

Step 2: Add hot water into the plastic cup with the sugar 

Step 3: Stir the water in the Cup 

Step 4: Cut a small piece of string 

Step 5: Wrap the string around the popsicle stick 

Step 6: put the string in the cup of liquid 

Salt Crystals

Salt crystals time-lapse video

Ratio: 4 Tablespoons salt to 1/2 cup water

Materials

1)Salt 

2)Water

3)String

4)Plastic cup 

5)popsicle stick 

Process

Step 1: Add salt into the plastic cup 

Step 2: Add hot water into the cup with the salt in 

Step 3: Stir The water and salt 

Step 4: Wrap the string around the popsicle 

Step 5: put the string in the cup of liquid 

Step 6:

Findings

Describe your crystals in the table below.

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

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

Type	Explanation
Salt	Salt is created by the Evaporation of salty water (sea water) which contains dissolved Na+ and Cl- ions. One finds rock salt deposits ringing dry lake beds, inland marginal seas, and enclosed bays and estuaries in arid regions of the world.
Sugar	Refined sugar is made from raw sugar that has undergone a refining process to remove the molasses. Raw sugar is sucrose which is extracted from sugarcane or sugar beet. ... The sugar syrup is concentrated by boiling and then cooled and seeded with sugar crystals, causing the sugar to crystallize out.
Snowflakes	A snowflake begins to form when an extremely cold water droplet freezes onto dust particle in the sky. This creates an ice crystal. As the ice crystal falls to the ground, water vapor freezes onto the crystal, building new crystals the six arms of the snowflake.

Water Filter

Aim: To make a filtration plant using household materials.

Water Filtration Plant

What is the filtration?

Filtration is separating solids from liquids by adding a medium through which only the liquid can pass. 

Examples are:

1.  Water Filter 
2.  Air Filter 
3.  Pool Filter 
4. Oil Filter 

Materials

1.Funnel 

2.Container 

3.Filter Paper 

4.Sand 

5.Pebbles 

6.Dirty Water 

7.Scissors 

8.Cup 

Process - ( use verbs or doing words in each step )

Step 1

Cut the bottle in half 

Step 2

Put the top half upside down in the bottom half 

STEP 3

Add layers of filter paper, Sand, Pebbles 

STEP 4

Get 1 cup of dirty water 

STEP 5

Pour the dirty water into the bottle `

Findings

Write a short sentence about the water every 1 minute. 

Include 'How much water has filtered through', 'How fast it is dripping through', and 'How clear the water is'.

Minutes:43mins
Drops per minute: 52
Watercolor: Murky White
Conclusion: The first time it filtered through half of the water and it came out really fast and it was still really dirty, then it, unfortunately, got knocked over, it went everywhere. The second time we put another layer of filter paper on top and poured the water in slowly instead of just chucking it in like last time. The second time the water came out a lot slower and a lot cleaner.

Flight

FLIGHT

Aim: To learn about flight and aerodynamics. 

• In your groups of 2 or 3, you will make a paper plane and measure its distance and behavior.
• In groups of 2 or 3, you will make a water rocket and record its distance and behavior. 

Definition:

The action or process of flying through the air 


4 forces of flight:

1. Gravity 
2. Thrust 
3. Lift 
4. Drag 

Paper Plane:

Material:

1. Paper
2. Ruler

3. Paper clip 
Steps:

1. Make paper plane 
2. fly the paper plane 
3. record results 

Findings:

Plane Type	Distance	Behavior
Normal	2.2	curve
Ailerons	2.6	swoop
Paper clip	3.2	swoop

Conclusion:

After the experiment, the one that went furthest was the paper plane with a paper clip, because the weight of the paper clip helped stop the paper plan from lifting which meant it went straighter than the rest. The second flight was with Ailerons and that made the plane lift which made it go further but then it hit something and fell. The last one was a normal paper plane, the wings of the plane made the plane curve and it didn't glide.