Forensic chemist

Today you will be a Forensic Chemist. 

A bag of white powder has been confiscated by the airport customs.  You need to find out what white powder it is?

Aim: To learn about the makeup of different white powders.



There are  a number of different white powders in our everyday life. Some of these are harmful and others are not. Test the four white powders listed to see which one has been found at the airport.

You will be given a small amount of 4 white powders on your cardboard. On the black cardboard using a magnifying glass look at the powders.

Look at them under your magnifying glass and record what you see. 

These are the four powders we will be using. Upload a photo of each powder. 

1.  Cornflour
2.  Baking Soda
3.  Salt
4.  Sugar 

Before you add the iodine, vinegar or water you will need to divide each powder into 3.

Findings:

Words to use: Absorbed, spread, frothed, fizzed, melted, blob,

	Sugar	Salt	Baking Soda	Cornflour
Appearance (White)	white	white	white	white
Grains (small, medium large)	small	large	small	very fine/medium
Smell (Strong, none)	strong	strong	strong/really bad	strong like vinegar
Iodine	brown	yellow	brown & black	light brown
Water	wet	nothing happened	turned into lumps	went blue
Vinegar	grey/wet	nothing happened	fizzed	lump

Write a conclusion about your findings. ( 4 plus sentences)
Use the Hexagon activity to give you some more ideas.

The sugar......
The salt.....
The Baking Soda......
The cornflour.....

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How to make 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) cup

4)stick

5)

Process

Step 1: Put your hot water in the cup.

Step 2: Then put your borax in the cup.

Step 3: Next we stored the hot water and the borax together.

Step 4: Then we put the stick on the cup

Step 5:

Step 6:

Sugar Crystals

Sugar crystals video

Ratio: 1 cup sugar to 1/2 cup water

Materials

1)sugar

2)water

3)stick

4)string

5)

Process

Step 1:Put your hot water in the cup.

Step 2: Then put your sugar in the cup.

Step 3: Next we stored the hot water and the sugar together.

Step 4: Then we put the stick on the cup

Step 5:

Step 6:

Salt Crystals

Salt crystals time lapse video

Ratio: 4 Tablespoons salt to 1/2 cup water

Materials

1)salt

2)water

3)

4)

5)

Process

Step 1:Put your hot water in the cup.

Step 2: Then put your salt in the cup.

Step 3: Next we stored the hot water and the salt  together.

Step 4: Then we put the stick on the cup

Step 5:

Step 6:

________________________________________________________________________

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

CRYSTAL TYPES

AIM: TO LOOK AT THE 7 DIFFERENT TYPES OF CRYSTALS

Sugar Crystals

Borax Crystals

7 different crystal shapes

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Fingerprints

Forensic Science

Definition

5 Forensic Science topics;

1.  white powder
2. ballistics 
3.  DNA
4.  money
5. fibres

  

Materials: 

1. stamp  
2.   balloon
3.   hand 

Steps

1.   put your finger on the stamp
2.   then  put  your finger on the balloon  
3. blow up the balloon see 

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Hurumanu - The feet can measure the height.

THE FEET CAN MEASURE THE HEIGHT

The bones of the feet can tell a lot about a person. What do feet reveal about a person's height? Forensic anthropologists team up with law enforcers to help solve crimes.

Bones of the feet can reveal an interesting fact about an individual. Let's combine math with forensics to see how.

Aim:  To use forensic science techniques to measure the height of a criminal.

Material:

1.  rule
2. you 

Findings:

Name	Foot  (cm)	Height (cm)
Hannah	26.cm	158 cm
Toni	24.cm	153.cm
PERCENTAGE	H: 17%	T: 15%

15 is the number used by investigators to determine a persons height based on their feet. This is because 15% of a persons height is the length of their foot.

Find out what percentage of your height is your feet. To do this you need to:
Divide the length of each person's foot by his/her height then multiply it by 100. 

15 is the number used by investigators to determine a persons height based on their feet. This is because 15% of a persons height is the length of their foot.


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Things that Fly

FLIGHT

Aim: To learn about flight and aerodynamics. 

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

Definition:

the action or process of flying through the air.

"an eagle in flight"

synonyms:

flying, soaring, gliding More

4 forces of flight:

1.   gravity
2.    thrust
3.   drag
4.   lift

Paper Plane:

Material:

1. paper
2. rluer

paper clip
Steps:

1. fold it in half 

2 make the top in trinag
3. make a flapQZS

Findings:

Plane Type	Distance	Behaviour
Normal	2.0	it went down to ground
Ailerons	2.m	it fled low
Paper clip	3.1	it went a long distant

Conclusion:

the normal one went the lest furtherest

Ailerons went low to ground

it went a long distant

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