Science Fair Project

The only dependent variable is the time the ice cubes take to melt. The controlled variables are the size of the ice cube, and the room conditions they melted in. Aim: To see which type of ice cube melts faster (the one with or without sugar).

My hypothesis is that if I add different amounts of sugar to the same amount of boiling water and allow it to be cooled, than the one with the additional cup of sugar will be the one that grows more crystals. I determined that my hypothesis was correct. The glass I chose to add the pure cane sugar did grow much more crystals at a

In this lab we tested how changing the content of the water affects the speed of the alka seltzer dissolving. My hypothesis was that the tap water would dissolve the tablet fastest, the salt water would be second fastest, and the sugar water would be the slowest. I was correct that the tap water would dissolve the fastest, but I was wrong in that the salt water would dissolve faster than the sugar water. I think that our results came out the way they did because of the amount of sugar and salt we put into the water. When we put the sugar and salt into the beakers, we came up with those measurements on the spot. After the salt and sugar had been added, the salt water was very cloudy, but you could barely tell the tap water from the sugar water.

14. The experiment was repeated with each water temperature until all tests had been conclusively completed.

These are refined sugars commonly added to food, beverages and pastries by consumers, cooks and manufacturers. It may also be found in natural sources like syrups, honey, fruit juices and fruit juice concentrates.

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

This factor was the temperature of the water used to dissolve the sugar. This water temperature was measured using a digital thermometer that had a precision of 0.1°C and in the experiment the water was heated to a temperature within 1°C of the target. In the experiment, it was decided that three

The first trend could occur because of sugar burning. Because when sugar burns it leaves a black residue, but also the bonds in sucrose that hold the atoms together as the oxygen molecules and sucrose molecules break off and the atoms rearrange themselves to create carbon dioxide and H20 molecules, which oxidizes itself and removes H20; therefore resulting in being faster in reaching the sound of crackling. The next trend with how it takes 3 or less minutes to change from one state to another could be because of the temperature ( 110 degrees Fahrenheit) used. When evaporation is occurring, the molecules in a hot solution are vibrating more rapidly (with more energy) than a room temperature solution and with an increase in temperature make it easier for molecules to escape the solution (evaporation), this therefore also could result in certain time differences between the states. Moreover, the trend with how the two independent solutions vary by 2 minutes could be because of their similarities as they are both crystalline solids that are soluble in water.

The scientific question in this experiment is “What temperature will grow the crystal with the greatest mass?” The hypothesis is “If salt crystals are grown at room temperature, then they will have the greatest mass”. The independent variable is water temperature. The dependent variable is crystal mass. The control group is room temperature water. Some control variables are cardboard brand, type of salt, and amount of salt To conduct this experiment, follow these procedures. Prepare a supersaturated solution by adding 11 tablespoons of salt. Cut out three cardboard square of the same size.Then soak the squares for five minutes. Put one piece of cardboard in the freezer, one piece somewhere at room temperature , and one in the oven. Take all

The hypothesis in this experiment that will be tested is “ If there is a higher temperature inside the jar,then bigger crystals will form because the heat speeds up reactions.’To figure out if this is correct, the scientist must get the temperature of each of the conditions they will be testing in. This composes

We are well aware that the sugar is a part of the carbohydrate family. Beginning of the sixteenth century is around when the production began, with Spanish and Portuguese exports supplying most of the European sugar. It consists of only two sources, sugar cane and sugar beets. Sugar beets were not essential economically until the middle of the nineteenth century, but the sugar cane has always been the leading supply of sucrose. Sugar cane is a large pant that has six known species.

Crystals were collected in a Buchner funnel, washed with alcohol, then ether, then transferred into a sample tube for storage.

The dependent variable refers to the status of the 'effect '(or outcome) in which the researcher is interested; the independent variable refers to the status of the presumed 'cause, ' changes in which lead to changes in the status of the dependent variable…any event or condition can be conceptualized as either an independent or a dependent variable. (Rosenthal & Rosnow, 1991).

The independent variable is the type of acid being used. The reactions will be tested using both an inorganic acid (hydrochloric) and an organic acid (ethanoic).

       What is an independent variable?  The independent variable is the variable that is manipulated by the researcher.  The independent variable is something that is hypothesized to influence the dependent variable.  The researcher determines for the participant what level or condition of the independent variable that the participant in the experiment receives.  For example, each participant in the experiment may be randomly assigned to either an experimental condition or the control condition.