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:

Equipment:

Baking Soda

Cornflour

Sugar

Salt

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.

Cornflour has large grains.

Cornflour is fine

Salt has small grains

Salt is rough

Sugar has small grains

Sugar is rough

Baking soda has small grains

Baking soda is okay

Method: we first used water to see how it reacted by baking soda, slat, sugar, and cornflour,

Next we did Hyde it reacted Another way to the others

It turned purple and black and orange

Im thinking that it reacted that way because of the grain and the feel and how it was made

Sciences

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 forensics to see how

Name Foot size Height

1 Ruby 21 1m 52

2 Cassie 20 1m 35

3 Manaia 22 1. 56

1. aim: based on someones feet size, we can measure there

height

2. hypothesis: know your foot

length

3. method: Have the students in your group remove their shoes and measure their height.

4. equipment

5. results

6. summary

7. conclusion