EVIDENCE!!! SCIENCE.

NAMES:                       EVIDENCE:                                     BURGERLAR:                                     


                                                                                                       
Lou Lou                          Sweet tooth                                        Jack the Jock because he has a sweet
                                                                                                tooth and he used the white powder on the                                                                                                   morning of the crime.

Dan the man                    Sweet tooth



Jake the jock                   Sweet tooth and used the white
                                       powder



Peg the leg                      Keeps the salt shaker in her purse
                                       and also puts salt on her shoulder

Science Work

1. Aim: based on someones feet size we can measure their height.
2. Hypothesis: Know a rough estimate of our height
3. Method: 
4. Have the students in your group remove their shoes and measure their height.
5. Measure the length of the adult's left foot from the wall to the tip of the big toe.
6. Examine the numbers. Do you see a pattern?
7. Divide the length of each person's left foot by his/her height. Multiply the quotient by 100. What do you get? You may also want to use the calculator on a computer for this activity
8. Equipment: 1 metre ruler, 30cm ruler, calculator
9. Result: I found that my feet were 25cm and my height was 182cm.
10. Summary: The police investigators and forensic scientists use 15% of a persons foot length is equal to their height.
11. Conclusion: By knowing what a persons foot size is we can determine their approximate height

Science Heights

1.Have the students in your group remove their shoes and measure their height. 

2.Measure the length of the adults left foot from the wall to the tip of the big toe.\

3.Examine the numbers. Do you see a pattern?

4.Divide the length of each persons left foot by his/her height.

multiply the quotient by 100. What do you get? You may also want to use a calculator on a computer for this activity.

The results of your calculations should be about 15, illustrating that the length of a persons foot is approximately 15 percent of his/her height.

Activity: Find out the approximate height of each of your classmates by measuring their foot and charting it on a spreadsheet. Use this proportion for your calculations: 15/100 = Length of foot/x (person's height).

When a forensic scientist has the length of a foot, the forensic scientist will be able to approximate the height of the individual. This works best on a full grown individual for the ratio of the body parts is slightly different in growing children.

Nini-1.50cm

Jnaya-148cm

Josh-157cm

liz-157cm

kiera-149cm

Powder Analysis Chart

Texture Smell Water Vinegar Iodine
Cornflour
Sugar
Salt
Baking soda

Method

1. Place one-fourth teaspoon (1 ml) of the flour white powders on a sheet of black construction paper. Label the powders on 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 of the column 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 on-half teaspoon (2ml) of each powder in a separate jar. Add 2 drops of iodine to each jar using the eye dropper. Record what happens in the Reaction to iodine column. Iodine should be handled with care. 

Cornflour - No Smell, It looks like flour, It stayed it didnt spread around.

Sugar - No Smell, It looks like Crystal, It turned into bubble, It Spread Around 

Salt - No Smell, It looks like crystal, It Spread Around 

Baking Soda - No Smell, It looks like flour or small crystals, It Looked like bubbles Whent its put onto the baking soda.