Science

=**//__Who poisoned Buzzlightyear?__//**=

=
//**__Data:__**// //The graph file is below.//
 * //__Introduction:__//** //This is on the experiment for the drinks at the crime. The purpose of the study is to find which of the six drinks was used at the crime scene. What is already known about the liquid at the scene is that the liquid was clear.//======
 * __//Hypothesis://__** //If the students do labs on six different liquids then one of them, the alcohol, will be the crime scene liquid because it is clear like the crime liquid.//
 * __//Materials://__**
 * 1) //Well plate//
 * 2) //Plastic graduated cylinder//
 * 3) //Glass eyedroppers//
 * 4) //Sodium bicarbonate//
 * 5) //Conductivity meter//
 * 6) //Goggles//
 * 7) //Matches//
 * //__Procedure:__//**
 * 1) //The students had to figure the densities of the liquids by pouring them into a plastic gratuated cylinder and seeing if it was denser than water or not.//
 * 2) //Then they looked at the liquids to tell what color it was and if it was transparent,transluecent, or opaque.//
 * 3) //Next they put all the liquids in the well plate and used the conductivity meter to see what kind of conductivity level it had.//
 * 4) //After cleaning the well plate the students put more liquids in the well plate again and put a little sodium bicarbonate in them to see how they would react.//
 * 5) //Finally, the teacher took matches and lit them and touched the flame to the liquid to see if the liquid was flammible.//

[[file:buzz lightyear drinks.lnk]]
//The table file is below.//

=
//A limitation from the equipment was that it was hard to tell what the densities were for four of the liquids that looked similar. A flaw was that because of the difficulty in seeing the densties of pure water, alcohol, salt water, and vinegar together, the students had to guess a bit to find there density levels. So, knowing that and if they didnt have to guess there could be a big difference on the graphs and tables.Which would lead to finding what was the wrap of the crime scene.// //Table file is below.//
 * //__Conclusion:__//** //From the data given the students know that the hypothesis is incorrect. Two reasons the hypothesis was wrong was that the crime scene liquid was not flammible as alcohol is and the crime scene liquid had a conductivity level of medium, while alcohol has a conductivity level of low. It was concluded that the crime scene liquid is pure water. Pure water, alcohol, and salt water are all clear, tranparent, and nothing happened when the students put sodium bicarbonate in them. Also, vinegar, grape drink, and lemonade with pulp all were not clear, they had a high conductivity level, and are not flammible. Alcohol was the only one of the six liquids that was flammible.//======
 * //__What was the Wrap at the Crime Scene?__//**
 * __//Introduction://__** //This is on the experiment over the wraps lab. The reason for doing these experiments were to find the crime scene wrap. What the students already know about the crime scene wrap is that it is a metal of some sort and silver.//
 * __//Hypothesis://__** //If the students do labs on six different wraps then one of them,the iron, will be the crime scene wrap because iron is a metal and is silver just like the crime scene wrap.//
 * __//Materials://__**
 * 1) //Wraps//
 * 2) //Conductivity meter//
 * 3) //Triple beam balance//
 * 4) //Plastic graduated cylinder//
 * 5) //Hydrochloric acid//
 * 6) //Goggles//
 * 7) //Well plate//
 * 8) //Glass beaker//
 * 9) //Glass eyedropper//
 * 10) //Prongs//
 * 11) //Sodium bicarbonate//
 * 12) //Magnets//
 * __//Procedure://__**
 * 1) //The students looked at a peice of each wrap and decided if the wrap was malleable and if it had luster or not.//
 * 2) //Then they put all six types of wraps in the well plate and used the conductivity meter to see what kind of conductivity level the wrap had.//
 * 3) //Next using triple beam balance they found the wraps mass (g) and using the plastic graduated cylinder they found its volume (ml), then they used the equation mass over volume to find its densities (g/ml).//
 * 4) //Finally, they used vinegar to put on the wraps to see how they would react.//
 * __//Data://__**

//A limitation of equipment in this experiment was that the conductivity meter was starting to rust. So, that could have messed up the conductivity level for the warps. A flaw was that the students would hold it wrong and that also affected the conductivity levels.Which then would lead to finding what the powder of the crime scene was.// //The limitation for this experiment was that the hot plate did not get very hot so it took a long time to start to melt. A flaw some students would forget to stir the water into the powder so the powder did not dissolve as easily.// This would lead to finding what the crime scene hot dog. __dogs__ || __Mass__ || __Volume__ || __Density__ ||
 * __**Wraps**__ || __**Malleable**__ || __**Conductivity**__ || __**Luster**__ || __**Reactivity**__ ||
 * __**Plastic**__ || Yes || low or none || No || Nothing ||
 * __**Aluminum**__ || yes || very high || Yes || Nothing ||
 * __**Zinc**__ || Yes || Very high || Yes || Nothing ||
 * __**Copper**__ || Yes || Low or none || Yes || some discoloration ||
 * __**Iron**__ || Yes || Very high || Yes || Some bubbling ||
 * __**Sulfur**__ || Yes || Low or none || No || Nothing ||
 * __//Conclusion://__** //Given the data shown the students know that they're hypothesis was incorrect. Some reasons why are that iron reacts with the vinegar while the crime scene wrap doesn't and that the iron has crescents on the side of it and the crime scene wrap does not. Plastic, copper, and sulfur all have a conductivity level of low or none. Aluminum, zinc, and iron all have a conductivity level of very high. Also, all the wraps are malleable. The students concluded that the crime scene wrap was zinc.//
 * __//What was the Powder at the Crime Scene?//__**
 * __//Introduction://__** //This is on the experiment over the possible powders at the crime scene. This is being done to find the powder that was at the crime scene. What is already known about the powder is that it is white.//
 * __//Hypothesis://__** //If the students experiment on all of the powders then one of the powders, sucrose, will be the crime scene powder because it is white just like the crime scene powder.//
 * __//Materials://__**
 * 1) //Well plate//
 * 2) //Glass eyedropper//
 * 3) //Conductivity meter//
 * 4) //Water//
 * 5) //Vinegar//
 * 6) //Hot plate//
 * 7) //Paper cups//
 * 8) //Glass stirring rod//
 * 9) //Goggles//
 * 10) //Matches//
 * __//Procedure://__**
 * 1) //First the students took all the powders and put them in the well plate, except for the sodium polyacrylate which went in a paper cup, and using an eyedropper put water in each and stirred it to see if it was soluble.//
 * 2) //Then they used the conductivity meter to find the conductivity level of the powders.//
 * 3) //On a seperate table were hot plates with the powders on it to see if they would melt.//
 * 4) //Next getting them in the well plate and paper cups they put vinegar in the powders to see how they reacted.//
 * 5) //Finally, the teacher used matches to see if the powders were flammible.//
 * __//Data://__**
 * __Powders__ || __Solubility__ || __Conductivity__ || __Melting__ || __Reactivity__ || __Flammibility__ ||
 * __Sucrose__ || No || low or none || yes || nothing || no ||
 * __Baking soda__ || yes || low or none || no || bubbles and fizzes || no, turned it black, purple ||
 * __Sodium polyacrylate__ || no || low or none || no || absorbs and grows out || no ||
 * __Sodium chloride__ || no || low or none || no || nothing || no ||
 * __Ascorbic acid__ || no || low or none || yes || nothing || no ||
 * __//Conclusion://__** //From the data the students know that they're hypothesis was correct. Sucrose is the crime scene powder. This is because when the students were experimenting on the crime scene evidence it melted yet it did not look like ascorbic acid. Baking soda was the only one that was soluble as sucrose and ascorbic acid were the only powders to melt. All the powders had a conductivity level of low or none. Also while baking soda is not flammible it did turn a blackish, purple.//
 * __//What was the Hot Dog at the Crime Scene?//__**
 * __//Introduction://__** //This is on the experiments on the hot dogs. The students did this as the last step in finding who poisoned Buzz Lightyear. What is already known is that the hot dog had a pink ikside and light brown skin.//
 * __//Hypothesis://__** //If the students test on all three hot dogs then the light pork hot dog is the hot dog from the crime scene because it has a pink inside and a lght brown skin like the hot dog at the crime scene.//
 * __//Materials://__**
 * 1) //Triple beam balance//
 * 2) //Iodine//
 * 3) //Plastic graduated cylinder//
 * 4) //Goggles//
 * 5) //Hot dogs//
 * 6) //Paper towels//
 * 7) //Glass beaker//
 * 8) //Glass eyedropper//
 * __//Procedure://__**
 * 1) //The students first looked at the hot dog to tell what color it was.//
 * 2) //Then they put the hot dog on the triple beam balance to find its mass (g) and put it id the graduated cylinder to find its volume (ml) to divide mass by volume to get its density (g/ml).//
 * 3) //Next they squized the juices out of the hot dog as much as they could and took its mass (g) again.//
 * 4) //Finally, they dropped two drops of iodine in the inside of the hot dog to see its reaction.//
 * __//Data://__**
 * __Hot__
 * __Pork hot dog__ || 10.8g || 10ml || 1.08g/ml ||
 * __Light pork hot dog__ || 12.2g || 11ml || 1.1111g/ml ||
 * __98% fat free hot dog__ || 12.8g || 12ml || 1.06666g/ml ||

//The crime scene hot dog was the pork hot dog.// //A flaw of the students was that they did not squize enough of the juices out so the hot dog could have had a smaller mass than what was recorded. The limitation of the experiment was that students could put different amounts of water in the graduated cylinder which could mess up several thing in the experiment. Knowing all this the next experiment would be to test the suspects. All together the labs would help find who poisoned buzz lightyear. Here is a website about scientist and forensics in the real world-http://www.ehow.com/how-does_5128441_forensic-science-used-solve-crimes.html//
 * __Hot dogs__ || __Color__ || __Mass pre squized__ || __Mass post squized__ || __Reactivity__ ||
 * __Pork hot dog__ || LIght brown skin pink inside || 10.8g || 10.3g || turned purplish black ||
 * __Light pork hot dog__ || Brown with dark brown spots skin pink inside || 12.2g || 11.5g || nothing ||
 * __98% fat free hot dog__ || Medium brown with red spots skin light brown inside || 12.8g || 12g || turned dark brown ||
 * __//Conclusion://__** //From the data given the students found that thier hypothesis was incorrect. This is due to the fact that the crime scene hot dog does not look like the light pork hot dog and when putting iodine on the hot dog it turned purplish, black. Also the light pork hot dog was the only hot dog that did not react to the iodine.//