Gravity - Helicopter Experiment

Gravity

https://www.youtube.com/watch?v=mn34mnnDnKU

Newton has 3 Laws of Motion.
They Are...

1. An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

2.Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).

3. For every action there is an equal and opposite re-action.

Aim: To make a helicopter and look at the force of gravity.

Hypothesis: The size of the wings will effect the speed that the helicopter travels.

Equipment:

1. Stopwatch - use the Google stopwatch on your chromebook
2. Helicopter template / paper
3. Drawing pin

Method:

1. Make the helicopter by cutting out the template.
2. Drop the helicopter from a height. Use the same person.
3. Time each drop and record the time when it hits the floor.
4. Each time it is dropped you will make a change to its form.

• With a paperclip on the bottom.
• Use heavier material ( Cardboard)
• Cut the body in half to give it a short body.
• Cut the wings to give it short wings

1. Time each time you drop it.
2. Record the findings on a chart

Type	Time
Paperclip	1:59 Seconds
Cardboard	1:91 Seconds
Short wings	1:71 Seconds
short body	1:79 Seconds

Findings: What do the findings from your four flights say? Write about them.

I found out that the paperclip one went down faster. Was It because of the paperclip? And the short wings went slower down.

Summary: What was the best result? ( The longest time will be the best. )

Graduate Profile For The End Of Year 8

I think how I can give useful feed back to others is...
If their work is good ask them questions and maybe ask them to do some pictures?

I think how I can become more of a curious learner is...
Think more deeply into the subject.

The Case Of The Barefoot Burglar

The case of the Barefoot Burglar

http://www.cyberbee.com/whodunnit/crimescene.html

In groups of 4 or five you are going to need to use your forensic knowledge to solve a crime.
Using the clues found at the crime scene, 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.

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.

• Sticky fingerprints were lifted from the aquarium and piggy bank. The painted footprints were measured. The chunk of chocolate candy was collected for examination. It appeared there were teeth imprints.
• The white powdery substance by the piggy bank was carefully placed in a plastic bag and taken to the forensic chemist for identification .

Name	Motive	Clues
Lou Lou	Ceramic Pigs.	Always Barefooted
Dan The Man	Trying to save money.	Baking Soda Left Behind
Peg The Leg	Supertistious Libarain (Carrys around salt)	Same Height As Foot Print Teeth Chiped
Jake The Jock	Hand were dry	Teeth Kind

Findings:

I found out that baking soda explodes when mixed with vinegar and that salt bubbles in vinegar. 

Verdict:

I think the quility one is Peg The Leg it all adds up! She carrys around salt and has chipped teeth. Plus her are two videos of salt and vingaer and vingear and baking soda.

Salt :

Baking Soda:

http://www.cyberbee.com/whodunnit/crimescene.html

The Person it was...Dan The Man! 

Let's Solve A Crime... What is The White Power?

White powder test?

A forensic scientist may discover powder at a crime scene. In order to determine if it is illegal or not the crime lab will identify the substance using chemistry. Take on the role of a forensic chemist to identify unknown substances.

Become a Forensic Chemist by following these procedures and filling in the Powder Analysis Chart with your results. 

Complete the appearance, texture, and smell activities before opening the vinegar and iodine bottles.

Record your findings in the Powder Analysis Chart below.

____________________________________________________________________

Aim: To determine how different powders feel, look and react to other substances.

Hypothesis: I thought that it would of gone more crazy like burn or something like that.

Equipment:
Baking Soda
Cornflour
Sugar
Salt
Iodine
Vinegar
Magnifying glass
Eyedrop
Black card
Tea spoon / stick

Method: 

1. Place one-fourth teaspoon (1 ml) of the four white powders on a sheet of black construction paper. Label the powders with your pen.
2. Study the powders with the magnifying glass. Examine what each powder looks like. How would you describe the powder's shape. Does it have large or small grains? Your observations should be written in the appearance column of the chart.
3. Examine the powders further by rubbing each powder between your fingers. Describe how each powder feels in the Texture column of the chart.
4. Determine if there is a smell to any of the powders. Record your findings in the Smell column of the chart.
5. Take the eyedropper and place a drop of water on each individual powder. Examine what happens? Do the powders dissolve? Is there a reaction? Write your observations in the Reaction to Water column.
6. Place one-half teaspoon (2ml) of each powder in a separate jar. Add 2 drops of iodine to each jar using the eyedropper. Record what happens in the Reaction to Iodine column. Iodine should be handled with care.

_____________________________________________________________________________________________

Findings:  

Powder Analysis Chart

                                                                                                  
Substance          Appearance   Texture    Smell     Water                      Iodine

B=Cornflour             Fine           Smooth       Nothing    Sits                          Sits and Turns Black

D=Sugar                Small            Rough       Sweet     Dissolves                    Dissolves and turns yellow        

C=Salt              Really Small      Rough       Strong    Dissolves                     Dissolves and turns yellow

A=Baking soda    Large              Smooth    Nothing    Dissolves/sits              Sits and turns yellow
 

Comparing test results of substances that are known help Forensic Scientists identify unknown substances.

Summary: When the water was put on the powders it would not dissolve on the cornflour but it did with the other 3.