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Monday, May 27, 2019

Plants

AIM: TO LEARN ABOUT THE NATURE OF PLANTS


Plants fall into two categories:

1. Evergreen
2. Deciduous

Image result for deciduous
Deciduous

Image result for evergreen
Evergreen

   
Find three examples of each:

Evergreen: 
1.  Kauri
2. Titoki
3.  Bottlebrushes

Deciduous:
1.  Oak
2.  Maple 
3. Elm

LEAVES


Image result for simple leaf

Simple                                 Compound   

Choose a leaf and do a leaf rubbing.

Example: 
Plant type: Deciduous / Evergreen
Leaf type: Simple / Compound
Leaf colour: Green
Photo of leaf: Image result for simple leaf
Plant drawing:Image result for tree drawing

Thursday, May 23, 2019

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


Determine which of the four suspects is the "Barefooted Burglar"?
What do you think was the motive for this crime?
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 hands 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:
swirl
Mouthprints:
protruding teeth
Shoe size:
White powder:
baking powder
Peg    Fingerprints:
loop
Mouthprints:
Shoe size:
White powder:
salt
Jake    Fingerprints:
swirl
Mouthprints:
Shoe size:
White powder:
corn starch
Lou    Fingerprints:
arch
Mouthprints:
Shoe size:
White powder:
sugar
Findings: ( what did you find. Summarise what you have written in the table above)

Dan the man and Peg the leg both have the same amount of evidence against them.

Verdict: ( who is the burglar and why)

Dan the man and Peg the leg worked together.

Monday, May 13, 2019

Aim: to find out what types of shapes crystals become


The 7 types of crystals


Type
Number of sides
Picture

2 EXAMPLES

Monoclinic
10

Image result for monoclinic crystal

Malachite, Mica.
Hexagonal
8Image result for Hexagonal crystalTourmaline, Beryl.
Tetragonal
12Image result for tetragonal crystalZircon, Rutile.
Trigonal
10Image result for trigonal crystalAlbite, Rhodonite.
Triclinic
7Image result for triclinic crystalAlbite, Rhodonite.
Cubic
6Image result for cubic crystalSalt, Gold.
Orthombic
6Image result for Orthorhombic crystalTopaz, Barite.

Formation of Crystals


The 7 types of crystals


Type
Number of sides
Picture

2 EXAMPLES

Monoclinic
10

Image result for monoclinic crystal

Malachite, Mica.
Hexagonal
8Image result for Hexagonal crystalTourmaline, Beryl.
Tetragonal
12Image result for tetragonal crystalZircon, Rutile.
Trigonal
10Image result for trigonal crystalAlbite, Rhodonite.
Triclinic
7Image result for triclinic crystalAlbite, Rhodonite.
Cubic
6Image result for cubic crystalSalt, Gold.
Orthombic
6Image result for Orthorhombic crystalTopaz, Barite.

Thursday, May 2, 2019

Aim: To learn about the makeup of different white powders

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.  
2.  
3.  
4.  
5.  
6.   
7. 

Steps

1. 
2. 
3. 
4. 
5. 
6. 


Findings:





Sugar
Salt
Baking Soda
Cornflour
Appearance




Texture




Smell




Iodine




Water




Vinegar





Write a paragraph about your findings.