Who Poisoned Buzz Lightyear? The Investigation By: Bailey Smith 5 th Period

Introduction Buzz Lightyear was poisoned at his cooking show. Twenty people came to it along with four different materials- a drink, a wrap, a powder, and a hot dog. The students know who came and what they brought. To investigate who poisoned him, the students are going to be conducting many tests on the different materials brought. Then, they will compare the collected data to the data collected from conducting the same tests on the evidence at the crime scene to determine what materials were left at the crime scene. This will help determine who did it by comparing the materials left at the crime scene to the materials brought by the suspects.

Hypothesis If salt water, aluminum, sodium chloride, and a fat-free hot dog were left at the crime scene, then Darth Vader poisoned Buzz Lightyear, because brought these materials to the cooking show.

Materials General materials: Well plate Glass beakers Eyedroppers Sodium bicarbonate (baking soda) Conductivity meter Triple beam balance Plastic graduated cylinder Hydrochloric acid Goggles Forceps Hand lens Hot plates Iodine Paper cups Stirring rods Spoons Matches

Materials Continued Drinks: Pure water Alcohol Salt water Vinegar Grape drink Lemonade Wraps: Plastic Aluminum Zinc Copper Iron Sulfur Powders: Sucrose (sugar) Sodium bicarbonate(baking soda) Sodium polyacrylate Sodium chloride (table salt) Ascorbic acid Hot Dogs: Pork hot dog Light pork hot dog Fat free hot dog

Procedure for Drinks: Drinks: Conductivity: Fill one of the holes in the well plate with one of the liquid. Put the tips of the conductivity meter in the liquid. Observe how bright the lights are and compare it to the back of the meter. Density: Pour about 10ml of water in a graduated cylinder. Pour another 10ml of the liquid you are testing in. Observe whether the liquid sinks or floats in the water. Reactivity with baking soda: Fill one of the holes in the well plate with one of the liquid. Pour ¼ a spoonful of baking soda into each liquid. Observe what happens. Flammability: Pour 100ml of the liquid in a beaker. Light a match and place it in the liquid. Observe whether or not it burns.

Procedure for Wraps: Wraps: Conductivity: Touch the tips of the meter to the wrap. Observe how bright the lights are and compare it to the back of the meter. Density: Place the piece of metal on a triple beam balance and move the weights right until the end of the beams is aligned with the mark. Look at where the weights are to determine the mass. Fill a graduated cylinder with 50ml of water. Drop the wrap in the water and observe how much the water level rises. The amount that the water level rises is volume. Divide mass/volume Reactivity with hydrochloric acid: Place one piece of the metal in the well plate. Put two drops of the hydrochloric acid on the metal and observe what happens.

Procedure for Powders: Powders: Solubility: Fill one of the two deeper holes in the well plate with water. Place a very small amount of the powder in the water. Stir it with the stirring rod. Observe whether or not the powder dissolves. Melting: Observed whether or not the powders melted on the burner. Conductivity: Fill one of the two deeper holes in the well plate with water. Place a very small amount of the powder in the water. Stir it with the stirring rod. Place the tips of the conductivity meter in the solution and observe how bright the lights are and compare it to the back of the meter. Reactivity with vinegar: Fill one of the holes on the well plate with the substance. Pour 2 drops of vinegar on. Observe what happens. Flammability: Light a match and put it on the powders. Observe whether or not it burns.

Procedure for Hot Dogs: Hot dogs: Mass (pre-squeeze): Place the hot dog on a triple beam balance. Move the weights right until the beam is aligned with the mark. Record what number each weight is on to determine the mass. Mass (post-squeeze): Place the hot dog parts on a triple beam balance. Move the weights right until the beam is aligned with the mark. Record what number each weight is on to determine the mass. Density (pre-squeeze): Fill a 100ml graduated cylinder with 60ml of water. Drop the hot dog in and record how much the water rises. Divide mass/volume Conductivity (pre-squeeze or post-squeeze): Place the tips of the conductivity meter in the hot dog. Observe how bright the lights are and compare it to the back of the meter. Reactivity with iodine (pre squeeze): Get a beaker with iodine and an eyedropper in it. Put two drops of iodine on the hot dog (not on the skin). Observe what happens.

Drink Data Drink:Physical: Color Physical: Conducti vity Physical: Density Physical: Optical properties Chemical: Flammabilit y Chemical: Reactivity with baking soda Pure Water ClearLowtransparentnonone AlcoholClearNonetransparentyesnone Salt Water Clear; cloudyVery hightransparentnonone VinegarClearmediumtransparentnoMuch fizz Grape Drink Purplemediumopaquenobubbled Lemona de Cloudy; yellowlowtranslucentnoSome fizz Crime Scene Liquid Clearlowtransparentnonone

Drink Data 2 Drink Pure Water Alcohol Salt Water Vinegar Grape Drink Lemonade Crime Scene Drink

Wrap Data WrapPhysical: Malleability Physical: Luster Physical: Conductivit y Physical: Density Chemical: Reactivity Plasticyesglossynone AluminumyesshinyVery highnone ZincyesshinyVery high CopperyesshinyVery high IronyesshinyVery high Sulfurnoglossynone Crime Scene Wrap yesshinyVery high

Wrap Data 2 Wrap Plastic Aluminum Zinc Copper Iron Sulfur Crime Scene Wrap

Powder Data PowderPhysical: Solubility Physical: Melting Physical: Conductivit y Chemical: Reactivity Chemical: Flammabilit y Sucrosenoyeshighno Baking Sodano Very highYes; bubblesNo; slightly burnt Sodium Polyacrylate yesnoVery highno Sodium Chloride no Very highno Ascorbic Acid yes highYes; bubblesno Crime Scene Powder

Powder Data 2 Powder Sucrose Baking Soda Sodium Polyacrylate Sodium Chloride Ascorbic Acid Crime Scene Powder

Hot dog Data Hot DogPre-squeezePost- squeeze DensityConductivit y Reactivity Pork11.2g9.6g1.02g/mlVery highyes Light Pork10.5g8.8g1.05g/mlVery highno Fat-free10.1g9.55g1.19g/mlVery highyes Crime Scene Hot Dog 11.7g8.9g1.009g/mlVery highyes

Hot dog Data 2 Hot Dogobservations Pork Light pork Fat-free Crime Scene hot dog

Conclusion The hypothesis of the student was incorrect, because he thought that salt water, aluminum, sodium chloride, and a fat free hot dog were left at the crime scene so Darth Vader poisoned Buzz. Comparing this to the data that shows that pure water, iron, sucrose, and a pork hot dog were left, apparently Ariel had truly poisoned Buzz, since all of them matched the crime scene materials. The data shows the hypothesis was incorrect…. The equipment was limited to…The flaws of their experiment were…The next logical experiment would be…

References Cited ???