Filtration

Aim: To make a filtration plant using household materials.

Water Filtration Plant

What is filtration?

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

Examples are:

1.  
2.  
3.  
4. 
   

Materials

1.Water bottle 

2.Water

3.Rocks (pebbles)

4.Dirt

5.Filter paper

6.Bottle top

7.Sand

8.Elastic band

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 other half of the bottle

STEP 3

Add layers of sand and rocks

STEP 4

Get 1 cup of dirty water 

STEP 5

Pour dirty water ontop of the rocks and sand

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'.

Conclusion:

In conclusion our water didn't go very clear but it went more clear than some, It was a fun exspirement.

The Barefoot Burglar

The case of the Barefoot Burglar

In groups of 3 you are going to need to use your forensic knowledge to solve a crime. You must use the web page: Barefoot Burglar Evidence

1. Determine which of the four suspects is the "Barefooted Burglar"? 
2. What do you think was the motive for this crime? 
3. Write the results of your findings and convince a jury of your peers

The Crime

At approximately 7:15 a.m., Friday morning, Mrs. King, the science teacher, thought something was fishy as she walked down the hall and noticed that her door was open. She walked into her classroom and immediately discovered that the small aquarium had been broken and her prized gold fish were gasping in the sink. Beside the broken aquarium were the shattered remains of the pink piggy bank that had been on the shelf above the aquarium. A can of blue paint was spilled on the floor. Footprints of a barefooted burglar led to an open window. Bits of a white powdery substance were found next to the broken, empty, piggy bank. The only other item found was a half-eaten large chunk of chocolate candy.

When the police arrived they immediately began to gather forensic evidence.

Dan the Man Height : 176 cm Alias: The General Dan was wearing a woolen general's uniform with small holes when apprehended in the woods. He claimed to be gnawing on wood for moisture and insects to practice his survival training. His teeth look like a beavers from gnawing. His wife complains that she never has any baking soda due to Dan's compulsion about storing clothes in mothballs. He thinks the baking soda takes away the mothball smell, so he stuffs his pockets with the substance. Also, his wife reports that her giant chocolate kisses continually disappear from the candy cupboard. He blames their dog Patton, an English bull terrier, who patrols the neighborhood. His neighbors report that Dan loves the military. He was very regimented about playing taps on his bugle every day at sunset until an irate neighbor broke his bugle. Dan has been trying to save money for a new one. Peg the Leg Height: 152 cm Alias: Lucky Lady

Peg is a librarian known for hanging horseshoes and four leaf clovers in her library. Employees say she is so superstitious she insisted on carpeting in the library instead of laying tiles so she would not step on the cracks. She wraps construction zone tape around open ladders so no one can walk under them. Cola bottles litter her office, which she drinks with chocolate chunks. Her teeth are chipped from knocking the bottles against them. She is always throwing salt over her shoulder for good luck and keeps a salt shaker in her purse. Her alibi is that she was busy closing open umbrellas the morning of the crime.

Jake the Jock

                                                                         Height 201 cm

                                                     Alias: Armchair Quarterback

                                                                                         

Jake the Jock is known for quoting statistics on every sport from boomerang throwing to sled dogging. His neighbors report that he is the neighborhood pitcher for baseball games. Last year a baseball hit him in the mouth and knocked out his front tooth. This has cramped his eating style of chocolate chunks, candied apples, and corn on the cob. His wife claims that on the morning of the crime Jake was rubbing his 5hands with cornstarch to keep them dry in preparation for an important baseball game.

• 
  

Lou Lou Height: 160 cm Alias: Sweet Tooth

Lou Lou is so addicted to sugar that she never leaves home without it. She loves to bake sweet things and has an entire pantry full of sugar bins. She claims to have been baking her famous chocolate chunk cookies the morning of the crime (although not a morsel of cookie or chocolate chunk was left when the police arrived.) Lou Lou rarely wears shoes, which often causes her to slip and break things, especially her collection of ceramic pigs. Evidence:

• Fingerprints: Sticky, 'swirl' fingerprints were lifted from the aquarium and piggy bank. 
• Footprints: The painted footprints were measured and were for 26 cm feet. 
• Teeth: The chunk of chocolate candy was collected for examination. It appeared there were teeth imprints.
• White Powder: The white powdery substance by the piggy bank was carefully placed in a plastic bag and taken to the forensic chemist for identification . It had very small grains and when mixed with Iodine it reacted making the colour brown. It did not have a smell.

Name: Dave

                        

Fingerprints: No.

Mouth prints: Has a chipped tooth.
Shoe size: 16
White powder: None found.

Name	Evidence
Dan	Fingerprints:Whirl Mouthprints: Missing tooth Shoe size: 8 White powder:Baking soda
Peg	Fingerprints: Mouthprints: Shoe size: White powder:Salt
Jake	Fingerprints: Mouthprints: Shoe size: White powder:Cornstarch
Lou	Fingerprints: Mouthprints: Shoe size: White powder:Sugar

Findings: ( what did you find. Summarise what you have written in the table above)

We found out the white powder was baking soda and that it bubbled with vinegar when they tested it , we found out that the 

Verdict: ( who is the burglar and why)

I found out that the barefoot burgler must have been Dan the man because of the baking soda , the baking soda was confirmed as the white powder because it bubbled (or reacted) to vinergar , and Dan is the only one with baking soda

White Powder

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.

Here are some examples of everyday kitchen white powders.

Flour, Cornflour, Sugar, Salt, Baking Soda, Baking Powder, Icing Sugar, Tartaric Acid

Citric Acid, Gluten Free flour

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.

Materials

1. Baking soda 
2. Sugar
3. Salt
4. Cornflour 
5. Pipette
6. Iodine
7. vinegar
8. water
9.cardboard
Steps

1. Folded the cardboard in four 
2. Then we write the names on each square of the cardboard (baking soda ect)
3. 
4. 
5. 
6. 

Findings:

Sugar	Salt	Baking Soda	Cornflour
Appearance	Grainy and thin	fine and grainy	light and fluffy	cloud like
Texture	hard and little	very little and hard	soft like velvet	soft and fluffy
Smell	sweet	soy sauce	doesn't have one	nothing
Iodine	expands and looks like dark chocolate	looks like caramel and doesn't expand very much	absorbed the iodine.	sat in a bubble and sunk to the bottom
Water	goes clear	goes clear	sits in a  bubble and does nothing	sinks though goes hard after a while
Vinegar	goes completely transparent	goes clear and soft	bubbles and goes frothy	sinks and goes hard

Write a paragraph about your findings.

Height - Science

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. Yourself / human
2. Metre ruler
3. 
   
4. 
   
5.  

Steps:

1.  Measure your feet
2.  Measure your length
3.  Put results in graph
4.  
5.  

Findings:

Name	Foot  (cm)	Height (cm)
Chloe	23cm	155cm
Talia	21cm	143cm
Sharney ( Not here )

Divide the length of each person's foot by his/her height. then multiply it by 100. 

Chloe

We found out my feet are 23 cm. My height is 155 cm. We divided my height by my foot length. Then we found out that it equaled 14.8 cm.