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Friday, May 24, 2019

Flight



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. 
Image result for flight forces
Definition:


4 forces of flight:

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

Paper Plane:

Material:

1. Paper x1
2. Ruler
3. Paper clip x2
Steps:

1. Fold in half
2. Fold top to two triangles 
3. Fold the top down around about the middle 
4. Fold in the other side in half 
Findings: I found out the paper clip makes my paper plane go further  


Plane Type
Distance
Behaviour
Normal
2.6

Ailerons
2.0

Paper clip


3.2

Conclusion: The paper clip plane went the thurst not sure why, but my guess is the paper clip maybe dose something to the plane. The others didn't go very fay maybe because of the way I threw it of how it was made.


Making Crystals

Aim: To learn about a saturated solution and how to make crystals
Definition of the 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.


Image result for borax crystals

Ratio; 3 Tablespoons Borax per 1/2 cup water

Materials

1) Cup
2) Borax
3) Water
4) Mixing tool 
5) Peg
6) Pipe cleaner

Process

Step 1: pour water into your cup
Step 2: pour borax into your cup
Step 3: Mix it up
Step 4: make a star with pipe cleaners
Step 6: Attach your star to your peg and hang the star into your cup.

Sugar Crystals
Sugar crystals video

Grow your own Sugar Crystals

Ratio: 1 cup sugar to 1/2 cup water

Materials

1) Cup
2) Sugar
3) Water
4) MIx tool
5) String

Process

Step 1: pour water into your cup
Step 2: pour sugar into your cup
Step 3: Mix it up
Step 4: Get an ice cream stick and tie your string on it so it's hanging into the cup
Step 5: Then wait 
Step 6:



Image result for how to make salt crystals

Ratio: 4 Tablespoons salt to 1/2 cup water

Materials

1) Cup
2) Salt
3) Water
4) Mix tool
5) String

Process

Step 1: pour water into your cup
Step 2: pour salt into your cup
Step 3: Mix it up
Step 4: Get an ice cream stick and tie your string on it so it's hanging into the cup
Step 5: Then wait for 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



diamond sharpmediumHard
Sugar



long sharp     smallhard
Salt



sharpSmallhard
What crystals worked out best and why?:

Conclusion:




Explain how the following crystals are formed:


Type
Explanation
Salt
Image result for salt crystal


when the water starts to evaporate from the fluid, the smallest particles begin to link together making the crystals.
Sugar
Image result for sugarcrystal

When the water starts to evaporate, the fluid turns soggier and sugar fragment will proceed to go out of the fluid and get on the seed crystals on the string
Snowflakes
Image result for snowflake crystal
A snowflake begins to form when it sudenly cold water droplet freezes onto a pollen or dust grain in the sky. 



Tuesday, May 21, 2019

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 goldfish were gasping in the sink. Besides 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 spilt on the floor. Footprints of a barefooted burglar led to an open window. Bits of a white powdery substance was 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 woollen 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 beaver 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 neighbourhood. His neighbours report that Dan loves the military. He was very regimented about playing taps on his bugle every day at sunset until an irate neighbour 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 sledge dogging. His neighbours report that he is the neighbourhood 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 a 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
DanFingerprints: Whorl
Mouthprints: Bever's teeth
Shoe size: 26.67
White powder: Baking soda 
PegFingerprints: Loop
Mouthprints: Cricerd teeth
Shoe size:
White powder: Salt
JakeFingerprints: Whorl
Mouthprints: One gap
Shoe size:
White powder: Corn starch 
LouFingerprints: Arch
Mouthprints: She has all teeth
Shoe size:
White powder: Sugar

Findings: ( what did you find. Summarise what you have written in the table above)
Jake Has a gap tooth he has a whorl fingerprint. Peg had cricerd teeth She also had a problem with breaking stuff like her collections of piggy banks.
Lou had Arch for fingerprints, all her teeth we all straight.  
Dan


Verdict: ( who is the burglar and why)
I think Dan and Peg because Dan's fingerprints match the ones the police found. Peg said she always broke her collection of piggy banks like the one round at the crime scene. Also, Dens mouth prints matched the one found on the chocolate