Avoid Changing Ice Cubes

If the temperature in the apparatus increases too quickly, it’s difficult to record to exact temperature at which the first drop of liquid falls and then again when the mixture is completely liquid. This would result in the wrong melting point range being recorded. Additionally, experiment three heavily relied on the results from experiment two. Failing to extract all the aspirin from the organic solution in experiment two would result in more impurities in the unknown component. Thus, lowering and broadening the melting point

One of our flaws was that the temperature of the water was not exactly the same when we did the different trials. The temperatures were slightly off from our recorded value during the experiments. The change in temperature would affect the time it took for the Alka-Seltzer tablet to dissolve in the water. If there was a direct relationship between water temperature and dissolve time, we would not be able to see it because the temperatures are off and the dissolve times are not associated with the correct temperature. Another flaw is that we did not use the same amount of water throughout the experiment. We used a beaker to measure the water, which did not result in accurate measurements. The difference in amount of water could result in a difference in reaction time. The third flaw in the experiment was that during the reaction of the warm water, the water in the cup overflowed and spilled, bringing some of the Alka-Seltzer tablet with it. There were different amounts of tablet in different areas of the water, which means a different amount of Alka-Seltzer remained inside of the cup in each trial. This difference would mean that data for the warm water would fluctuate and we would not have accurate

However, the results are completely different. The results shown in the table, the water and cornstarch solution is most suitable liquid to use in the snow globes due to its thick viscosity compared to other solutions. Hence, the marble traveled slower as it created more drag onto the marble. Nevertheless, the water itself had low viscosity compared to other solutions because the marble reached the base faster of the measuring cylinder. As a result, it created less drag onto the marble compared to water and cornstarch solution. Therefore, the thicker the solution, the longer it takes for the marble to reach the base of the measuring cylinder. However, if the solution has low viscosity (such as water itself), the faster it the time it takes for the marble to reach the

The purpose of this experiment was to investigate the effect that different liquids would have on gummy bears. To do this we brought in different liquids, such as Fanta soda, salt water, water, and baking soda water. My hypothesis is, If you put gummy bears in different liquids then they might dissolve or enlarge. This experiment was tested on 9-14-17 and my group and I started gathering data, we started with 1 minute, 5 minutes, and then 24 hours. There wasn’t much change in the 1 and 5 minutes, the real change happened overnight. The next day of this experiment the gummy bears had mostly enlarged and softened, there was one that accomplished to do the exact opposite, the salt water gummy bear decreased and hardened. I believe that the salt

Hypothesis- Ice cream melts faster in warm weather vs cold weather. Null Hypothesis- weather has no bearing on ice cream melting.

The objective of this experiment is to test the melting point of ice against different variables. I will use a control of ice against air and test this next to ice in water, sugar on ice, salt on ice and Baking Soda on ice. By measuring the melting time of each element on an ice cube I will be able to tell which element affects ice’s melting properties at what rate.

The scientific question of the project was, Does the size of a tire affect the bike’s speed? The hypothesis was , If the smaller tires were used, then the bike would go faster. The important procedures were: Make sure all equipment is ready. Test the standard wheel of 1 rotation or pedal a second to ride to the finish line. Test smaller and bigger wheels. Record data and have at least 3 trials. Record the data on a piece of paper and compare results to your hypothesis. The Independent variable is the size of the wheel on the bike. The Dependent variable is the standard wheel or tire on the bike. The control group was the bike’s speed and the standard wheel or tire. The Experimental group is the other tires or wheels being tested on the bike. The control variables were the rate of pedaling , the same bike model was used, and the same distance for

The Mad Hatter There are many confusing ways Lewis Carroll uses wordplay, ambiguity, and other quirks of language that creates an illusion of madness and logic in A Mad Tea Party in Alice’s Adventures in Wonderland. The way the characters are portrayed creates a complicated image of nonsense throughout the story. The obscurity of the character's lead to an unaccepting rationality and creates confusion for the reader. Wordplay, ambiguity and other quirks through the character's are tied together and are representative symbols of how Carroll gets his point across in creating confusion for the reader.

President Franklin D. Roosevelt delivered his war speech and asserted December 7, 1941 as, “a date which will live in infamy.” The United States’ naval bases stationed in Pearl Harbor, Hawaii were struck by Japanese planes intentionally and promptly. The news of this attack on the Pearl Harbor shocked the world. It was devastating to the nation that were still in the throes of depression. Witnesses of this event painted a portrait of a nation stunned, but determined to rise again. The United States’ government had not disclosed a Pearl Harbor story to the public--that the U.S. had failed to act on advance information about a planned Japanese attack. Japan 's move against the United States was audacious enough to be considered no more than a slight possibility, although the potential for an attack had been widely discussed.

In this experiment hollowed out eggs were soaked in coke, tea and coffee for five days to see which drink would discolor teeth the most. As stated in the data interpretation coke discolored the egg the most. My hypothesis was incorrect and contradicted my results. I thought that tea would stain the egg the most but the results proved that Coke stained the egg the most. The eg in this experiment was used to resemble a tooth because the egg's shell is much like the enamel on our teeth. The independent variable was the drinks and the dependant variable was the progress of discoloration. Coke discolored the egg the most for three days, tea discolored the egg for two days, and coke stained the egg the most zero days.

Hypothesis: If the sugar in the ice cubes will cause the ice cubes to melt quicker than the ones without it. Equipment:  1 tablespoon (20 g) White Sugar  280 ml of water (this needed to be divided in half for the different types of ice cubes, so 140 ml for each ice tray and 10 ml for each cube)  2 ice trays (with 14 cube slots)  Freezer  2 Plates  Measuring jug  Stopwatch 

    One possible source of error that can affect the results was that a mercury thermometer was used instead of an electronic one. The use of a mercury

vaccines will reduce grey squirrel numbers without causing the same stress as capture traps. This therefore is a more humane method of reducing grey squirrel numbers. It will work by having the vaccine inserted into the grey squirrels food. This would be a long term control measure as it would impact the ability to reproduce, decreasing the number of grey squirrels as the years go on.The vaccine would sterilise both male and female species as it will cause an antibody affect causing the immune system to target the sperm. this will lead to considrable falls in the number of grey squirrels being produced. with figures suggesting that it would only require 80% of squirrels to be vaccinated in order for the population to fall dramatically.

After that I waited until the entire ice cube melted. This took about two hours or so. Now that the ice had all melted and absorbed into the paper towel I could see that the ice cube had either broke through the paper towel, absorbed fully into the paper towel or leaked though in some spots. When I was finished looking over what had happened, I wrote down the results and everything all of my observations.

* Develop a data table in which you will record the temperature of each ice cream sample (one on water ice and one on dry ice) every 2 minutes for 16 minutes (or until the samples are significantly